Find two values of thata that satisfy sec=-2.5593 on the interval [0 degrees,360 degrees]

Answer 1

sec = -2.5593

cos = -0.39073184073770171531278083851053....+

cosine is negative in quadrants 2 and 3

the angle via inverse cosine is 113

180 - 113 = 67 , so 180 + 67 = 247

The angles are 113 and 247 which in radians is 1.972220547535924218237705683921... and

4.3109632524259940550015161981669