cot2A – cos2A is equal to:

cos2A . sin2A cos2A . cot2A 1 0

cos2A . cot2A

cot2A – cos2A = $\frac{cos^2A}{sin^2A}$ - cos²A = $\frac{cos^2A(1 - sin^2A)}{sin^2A}$ = $\frac{cos^2A.cos^2A}{sin^2A}$ = cos2A . cot2A