17)

Find an equation for the graph. 4- 2 X 3 -2 N - . . Type the equation of the given graph in the form y = A sin Bx or y = A cos Bx. (Type an equation. Type an exact answer, using it as needed. Use integers or fractions for any numbers in the equation. Simplify your answer.)Verify the identity. cos {0H [3) cos {a [3): cos sin 2:: <:> Write the left side of the identity using the sum and difference formula. DHD) E (Type the terms of your expression in the same order as they appear in the original expression.) The angle of elevation to the top of a building changes from 21" to 42" as an observer advances 75 feet toward the building. Find the height of the building, x, to the nearest foot. The height of the building is approximately feet. (Do not round until the final answer. Then round to the nearest whole number as needed.)Write the trigonometric expression as an algebraic expression containing x and y. Assume that x and y are positive and in the domain of the given inverse trigonometric function. tan [cos - 1x - sin - 1y] . . . tan [cos - 1x - sin - 1y] = (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)