State an equivalent expression to each of the following.

Question

State an equivalent expression to each of the following.

Answer 1

the equivalent angle measure is the angle made with the horizontal axis, then using quadrant to determine the sign. for example, angle of 120 is 60 degrees from horizontal axis and in quadrant where cos is negative so cos120 would be the same as -cos60.

equivalent answers to expressions given:

-sin60

-cos50

-tan70

-sec10