Question

If cos x + sec x = 4, then cos^(3)x + sec^(3)x =
(a) 62
(b) 68
(C) 52
(d) 64​

Answer 1

Answer:

The equation sin x = cos x can also be solved by dividing through by cos x. If we put k = 0 and k = 1 we get the solutions /4 (45°) and /4 + = 5 /4 (45°+ 180°= 225°).