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mathematics
basic technical mathematics

Questions and Answers of Basic Technical Mathematics

Show that tan( x− π/3) = −tan(π/3 − x) on a calculator.
What is the period of the function y = 2 cos 0.5x + sin 3x?
What is the period of the function y = sin πx + 3sin 0.25πx ?
Find the function and graph it if it is of the form y = a sin x and passes through (5π/2, 3).
Find the function and graph it if it is of the form y = a cos x and passes through (4π, −3).
Find the function and graph it if it is of the form y = 3 cos bx and passes through (π/3, −3) and b has the smallest possible positive value.
Find the function and graph it if it is of the form y = 3 sin bx and passes through (π/3, 0) and b has the smallest possible positive value.
Find the function and graph it for a function of the form y = 3 sin(πx + c) that passes through (−0.25, 0) and for which c has the smallest possible positive value.
Write the equation of the cosecant function with zero displacement, a period of 2, and that passes through (0.5, 4).
A circular disk suspended by a thin wire attached to the center of one of its flat faces is twisted through an angle θ. Torsion in the wire tends to turn the disk back in the opposite direction
The blade of a saber saw moves vertically up and down at 18 strokes per second. The vertical displacement y (in cm) is given by y = 1.2 sin 36πt, where t is in seconds. Sketch at least two cycles of
The velocity v (in cm/s) of a piston in a certain engine is given by v = ωD cosωt, where ω is the angular velocity of the crankshaft in radians per second and t is the time in seconds. Sketch the
A light wave for the color yellow can be represented by the equation y = A sin 3.4 × 1015 t. With A as a constant, sketch two cycles of y as a function of t (in s).
The electric current i (in A) in a circuit in which there is a full-wave rectifier is i = 10 |sin120πt| . Sketch the graph of i = f (t) for 0 ≤ t ≤ 0.05 s. What is the period of the current?
The vertical displacement y of a point at the end of a propeller blade of a small boat is y = 14.0 sin 40.0πt. Sketch two cycles of y (in cm) as a function of t (in s).
In optics, two waves are said to interfere destructively if, when they both pass through a medium, the amplitude of the resulting wave is zero. Sketch the graph of y = sin x + cos(x + π/2) and find
The vertical displacement y (in ft) of a buoy floating in water is given by y = 3.0 cos 0.2t + 1.0 sin 0.4t, where t is in seconds. Sketch the graph of y as a function of t for the first 40 s.
Find the simplest function that represents the vertical projection y of a 12-mm sweep second hand on a watch as a function of time t (in s).
The London Eye Ferris wheel has a circumference of 424 m, and it takes 30 min for one complete revolution. Find the equation for the height y (in m) above the bottom as a function of the time t (in
A drafting student draws a circle through the three vertices of a right triangle. The hypotenuse of the triangle is the diameter d of the circle, and from Fig. 10.51, we see that d = a sec θ. Sketch
The vertical motion of a rubber raft on a lake approximates simple harmonic motion due to the waves. If the amplitude of the motion is 0.250 m and the period is 3.00 s, find an equation for the
In Exercises sketch the appropriate curves. A calculator may be used.At 40°N latitude the number of hours h of daylight each day during the year is approximately h = 12.2 + 2.8 sin [π/6 (x −
In Exercises sketch the appropriate curves. A calculator may be used.The equation in Exercise 83 can be used for the number of hours of daylight at 40°S latitude with the appropriate change. Explain
In Exercises sketch the appropriate curves. A calculator may be used.If the upper end of a spring is not fixed and is being moved with a sinusoidal motion, the motion of the bob at the end of the
In Exercises sketch the appropriate curves. A calculator may be used.One wave in a medium will affect another wave in the same medium depending on the difference in displacements. For water waves y1
Sketch the appropriate curves. A calculator may be used.The height y (in cm) of an irregular wave in a string as a function of time t (in s) is y = 0.15 − cos 0.25t + 0.50 sin 0.5t. Sketch the
Sketch the appropriate curves. A calculator may be used. The loudness L (in decibels) of a fire siren as a function of the time t (in s) is approximately L = 40 − 35cos 2t + 60 sin t. Sketch this
Sketch the appropriate curves. A calculator may be used. The path of a roller mechanism used in an assembly-line process is given by x = θ − sinθ and y = 1 − cosθ. Sketch the path for 0 ≤ θ
Sketch the appropriate curves. A calculator may be used. The equations for two microwave signals that give a resulting curve on an oscilloscope are x = 6sinπt and y = 4 cos4πt. Sketch the graph of
Sketch the appropriate curves. A calculator may be used. The current in a certain alternating-current circuit is given by i = 2.0 sin(120 πt). Find the function for voltage if the amplitude is 5.0 V
Sketch the appropriate curves. A calculator may be used. The charge q (in C) on a certain capacitor as a function of the time t (in s) is given by q = 0.0003(3 − 2 sin100t cos100t). Sketch one
The instantaneous power p (in W) in an electric circuit is defined as the product of the instantaneous voltage e and the instantaneous current i (in A). If we have e = 100 cos 200t and i = 2 cos(200t
A wave passing through a string can be described at any instant by the equation y = a sin(bx + c). Write one or two paragraphs explaining the change in the wave (a) If a is doubled, (b) If
Graph the function if the given changes are made in the indicated examples of this section.In Example 4, if the sign of the coefficient of sin x is changed, display the graph of the resulting
Determine the amplitude, period, and displacement for each function. Then sketch the graphs of the functions. Check each using a calculator. y = -sin x + -F)
Refer to the wave in the string described in Exercise 37 of Section 10.3. For a point on the string, the displacement y is given by We see that each point on the string moves with simple
Display the graphs of the given functions on a calculator.y = 8 sin 0.5x − 12 sin x
Give the amplitude and sketch the graphs of the given functions. Check each using a calculator.y = −30 sin x
Give the amplitude and sketch the graphs of the given functions. Check each using a calculator.y = −sin x
Find the amplitude and period of each function and then sketch its graph.y = 15 sin 1/3x
Determine the amplitude, period, and displacement for each function. Then sketch the graphs of the functions. Check each using a calculator. y = 3 cos 100 8
Sketch the graphs of the given functions by use of the basic curve forms (Figs. 10.23, 10.24, 10.25, and 10.26). See Example 1.y = −60 sec xData from Example 1:Sketch the graph of y = 2sec x.First,
Sketch the curves of the given trigonometric functions. Check each using a calculator.y = −3 cos1/3x
View at least two cycles of the graphs of the given functions on a calculator.y = tan 2x
Display the graphs of the given functions on a calculator.y = 2 sin x − cos1.5x
Give the amplitude and sketch the graphs of the given functions. Check each using a calculator.y = 3/2cos x
Find the amplitude and period of each function and then sketch its graph.y = 4 cos 10πx
Determine the amplitude, period, and displacement for each function. Then sketch the graphs of the functions. Check each using a calculator. 0s (1/x- y = 30 cos + π 3/
For an alternating-current circuit in which the voltage e is given by e = E cos(ωt + ∅), sketch two cycles of the voltage as a function of time for the given values.E = 80 mV, ω = 377 rad s, ∅
Sketch the curves of the given trigonometric functions. Check each using a calculator.y = 24 cos6x
Sketch the graphs of the given functions by use of the basic curve forms (Figs. 10.23, 10.24, 10.25, and 10.26). See Example 1.y = −3 csc xData from Example 1:Sketch the graph of y = 2sec x.First,
Display the graphs of the given functions on a calculator.y = 1/2 sin4x + cos2x
Give the amplitude and sketch the graphs of the given functions. Check each using a calculator.y = 0.8 cos x
Find the amplitude and period of each function and then sketch its graph.y = 3 cos 4πx
For an alternating-current circuit in which the voltage e is given by e = E cos(ωt + ∅), sketch two cycles of the voltage as a function of time for the given values.E = 170 V, f = 60.0 Hz, ∅ =
Sketch the curves of the given trigonometric functions. Check each using a calculator.y = 0.4 cos 4x
Determine the amplitude, period, and displacement for each function. Then sketch the graphs of the functions. Check each using a calculator. y = = 2 sin(x + 1)
Display the graphs of the given functions on a calculator.y = 20 cos2x + 30 sin x
Sketch the graphs of the given functions by use of the basic curve forms (Figs. 10.23, 10.24, 10.25, and 10.26). See Example 1.y = −0.1 tan xData from Example 1:Sketch the graph of y = 2sec
Give the amplitude and sketch the graphs of the given functions. Check each using a calculator.y = 0.25 cos x
Find the amplitude and period of each function and then sketch its graph.y = 2 sin 3πx
A satellite is orbiting Earth such that its displacement D north of the equator (or south if D < 0) is given by D = A sin(ωt + ∅). Sketch two cycles of D as a function of t for the given
Sketch the curves of the given trigonometric functions. Check each using a calculator.y = 4.5 sin12x
Determine the amplitude, period, and displacement for each function. Then sketch the graphs of the functions. Check each using a calculator. ㅠ - I sin (2 x - 4) 2 y =
Display the graphs of the given functions on a calculator.y = cos3x − 3 sin x
Give the amplitude and sketch the graphs of the given functions. Check each using a calculator.y = 200 cos x
Sketch the graphs of the given functions by use of the basic curve forms (Figs. 10.23, 10.24, 10.25, and 10.26). See Example 1.y = −8 cot xData from Example 1:Sketch the graph of y = 2sec x.First,
Find the amplitude and period of each function and then sketch its graph.y = 520 sin 2πx
A satellite is orbiting Earth such that its displacement D north of the equator (or south if D < 0) is given by D = A sin(ωt + ∅). Sketch two cycles of D as a function of t for the given
Sketch the graphs of the given functions by use of the basic curve forms (Figs. 10.23, 10.24, 10.25, and 10.26). See Example 1.y = 3/2 csc xData from Example 1:Sketch the graph of y = 2sec x.First,
A point on a cam is 8.30 cm from the center of rotation. The cam is rotating with a constant angular velocity, and the vertical displacement d = 8.30 cm for t = 0 s. See Fig. 10.37. Sketch two cycles
Sketch the curves of the given trigonometric functions. Check each using a calculator.y = 2 sin 3x
Determine the amplitude, period, and displacement for each function. Then sketch the graphs of the functions. Check each using a calculator. y = 0.4 sin(3x + FIM
Display the graphs of the given functions on a calculator.y = sin x− 1.5 sin 2x
Give the amplitude and sketch the graphs of the given functions. Check each using a calculator.y = 35 sin x
Find the amplitude and period of each function and then sketch its graph.y = −4 cos 3x
A point on a cam is 8.30 cm from the center of rotation. The cam is rotating with a constant angular velocity, and the vertical displacement d = 8.30 cm for t = 0 s. See Fig. 10.37. Sketch two cycles
Display the graphs of the given functions on a calculator. y = 1 x² +1 COS TX
Sketch the curves of the given trigonometric functions. Check each using a calculator.y = 2.3 cos(−x)
Find the function of the form y = 2 sin bx if its graph passes through (π/3, 2) and b is the smallest possible positive value. Then graph the function.
Sketch the graphs of the given functions by use of the basic curve forms (Figs. 10.23, 10.24, 10.25, and 10.26). See Example 1.y = 1/2 sec xData from Example 1:Sketch the graph of y = 2sec x.First,
Give the amplitude and sketch the graphs of the given functions. Check each using a calculator.y = 5/2sin x
Find the amplitude and period of each function and then sketch its graph.y = −cos 16x
Determine the amplitude, period, and displacement for each function. Then sketch the graphs of the functions. Check each using a calculator.y = −cos(2x − π)
Sketch the curves of the given trigonometric functions. Check each using a calculator.y = −2cos x
Sketch two cycles of the curve of a projection of the end of a radius on the y-axis. The radius is of length R and it is rotating counterclockwise about the origin at 2.00 rad/s. It starts at an
Determine the amplitude, period, and displacement for each function. Then sketch the graphs of the functions. Check each using a calculator. y = -sin(3x - 2
Display the graphs of the given functions on a calculator.y = x3 + 10 sin 2x
Sketch the graphs of the given functions by use of the basic curve forms (Figs. 10.23, 10.24, 10.25, and 10.26). See Example 1.y = 3cot xData from Example 1:Sketch the graph of y = 2sec x.First, we
Give the amplitude and sketch the graphs of the given functions. Check each using a calculator.y = 15 sin x
A graphing calculator may be used in the following exercises. In Exercises, sketch two cycles of the curve given by d = Rsin ωt for the given values.R = 18.5 ft, f = 0.250 Hz
Find the amplitude and period of each function and then sketch its graph.y = -1/5 sin 5x
Sketch the curves of the given trigonometric functions. Check each using a calculator.y = −4sin x
Use a calculator to display the Lissajous figure for which x = sinπt and y = 2 cos 2πt.
Determine the amplitude, period, and displacement for each function. Then sketch the graphs of the functions. Check each using a calculator. +/-) y = 0.2 sin 2x +
Sketch the curves of the given functions by addition of ordinates.y = sin x + sin 2x
Give the amplitude and sketch the graphs of the given functions. Check each using a calculator.y = 3 sin x
In Exercises, sketch the graphs of the given functions by use of the basic curve forms (Figs. 10.23, 10.24, 10.25, and 10.26). See Example 1.y = 2 tan xData from Example 1:Sketch the graph of y =
A graphing calculator may be used in the following exercises. In Exercises, sketch two cycles of the curve given by d = Rsin ωt for the given values.R = 2.40 cm, ω = 2.00 rad/s
Find the amplitude and period of each function and then sketch its graph.y = −2 sin 12x

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