precalculus please explain simple as possible thanks

Question

Find an angle  with  that has the same:

Sine as :  = ___degrees

Cosine as :  =____  degrees

Answer 1

Becky

We need to look at quadrants other than the first quadrant which has angles 0 to 90^o

The sin function is positive in the first and second quadrants ... so sin 50^o will be the same as sin 130^o .... (as in 180^o-50^o)

The cos function is positive in the first and fourth quadrants ... so cos 50^o will be the same as cos 310^o ... (as in 360-50^o)

Hope that helps

Flora