An angle in standard position crosses the unit circle at (0, - 1). Which could be the angle measures?

It could be 270, -90 in degrees

or if you're in radians it would be 3/2 pi or -1/2 pi

answer: group b.

step-by-step explanation:

yx = 36

step-by-step explanation:

cos f = opposite side/ hypotenuse

cos f = yw / yx

we know cos f = 4/9 and yw =16

4/9 = 16/yx

multiply each side by yx

4/9 yx = 16/ yx * yx

4/9 yx = 16

multiply each side by 9/4

9/4 * 4/9 yx = 16 *9/4

yx = 36