Question

Verify this identity: secx-cosx = 1-cos^2x/cosx

Answer 1

Explanation:

sec x − cos x

Secant is the inverse of cosine:

(1 / cos x) − cos x

Find the common denominator:

(1 / cos x) − (cos² x / cos x)

Subtract:

(1 − cos² x) / cos x