Question

Find cos x if
SIN^2 x-1/COS x= -1

a. -1
b. 2
c. 1
d. 0

Answer 1

The correct answer is C. 1

Explanation:

Answer 2

Explanation:

sin²x-1/cosx= -1

cosx=-(sin²x-1)

cosx=1-sin²x

cosx=cos²x

cosx=1

so option C is the correct answer