Question

To evaluate the sine, cosine, and tangent of the angle, first find a coterminal angle of the given angle.

Answer 1

Yes.. this is what you do... but there isn't a problem here.

Answer 2

i dunno

Answer 3

what is it that you don't know? :)

Answer 4

how to find the coterminal angle

Answer 5

a coterminal angle is an angle that is obtained when you either subtract or add the angle with 360 degrees :)

Answer 6

example:

Let's say we have A = -200 degrees, find the positive and negative coterminal angle

In this case, the positive coterminal angle is

Coterminal angle = -200 + 360 = 160 degrees

Coterminal angle (negative) = -200 -360 = -560 degrees

are you understanding it now bit by bit? :)