First we take the reciprocals of both sides, using the

fact that the reciprocal of the secant is the cosine:







Rationalize the denominator on the right side:



















This is positive, and the cosine is positive in QI and QIV



From the unit circle, we get the first quadrant answer as 30°

or 



The interval  is Q4,



So to get the angle in Q4, we subtract from .







Answer: 



Edwin 
 

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