Rewrite cos 52 degree in terms of its cofunction cos 52 degr

Rewrite cos 52 degree in terms of its cofunction. cos 52 degree = degree (Type an exact answer. Simplify your answer. Type an

Solution

The value of a trig function of an angle equals the value of the cofunction of the complement of the angle.

Since co-function of cosx :

cosx = sin(90 -x)

So, cos52 = sin(90 -52)

= sin38