Question

On which of the following intervals is the function f(x) = 4 cos(2x − π) decreasing?

x = pi over 2 to x = π

x = 0 to x = pi over 2

x = pi over 2 to x = 3 pi over 2

x = π to x = 3 pi over 2

Answer 1

For an angle Θ with the point (16, −30) on its terminating side, what is the value of cosine?

16

−30

negative 15 over 17

8 over 17