MATH 1 15 Precalculus Summer, 2017, V3.1 10. A can of soda at 820 F. is placed in a refrigerator that maintains a constant temperature of 350 F. The temperature 7 of the soda f minutes after it is placed in the refrigerator is given by T(t) = 35 + 47 e -0.058 : Find the temperature of the soda 10 minutes after it is placed in the refrigerator. (Round to the nearest degree.) Answer: 1 1. Given the function f(x) = = + 2x, find a formula for the inverse function. Answer: 12. (a) State the reference angle associated with 120". Answer. (b) Convert 2250 to radians. Leave the answer in terms of It. Answer. 13. Given y = 5 sin(8x - n), state the (a) period Answer: (b) phase shift Answer. 14. Solve the trigonometric equation (cos x) (2 sin x - 1) = 0 in the interval [0, 360"). Answer: 15. (a) Find the exact value of arcsin ( sin 21) Answer: (b) Find the exact value of arccos ( tan ) Answer: 16. For the parabola given by (x - 3)' = 8(y + 8), find the following: (a) direction parabola opens (to the left, right, up, or down) Answer: (b) vertex Answer: (c) focus Answer. Page 4 of 7