cosec^2x – 1 = ______________ A. cot^2x B. -cot^2x C. tan^2x

cosec-2x-1-a-cot-2x-b-cot-2x-c-tan-2x

cosec^2x – 1 = ______________

A. cot^2x

B. -cot^2x

C. tan^2x

D. -tan^2x

I had been asked this question in an online quiz.

My doubt is from Trigonometric Functions in division Trigonometric Functions of Mathematics – Class 11

Correct answer is A. cot^2x

To explain: We know, cosec^2x – cot^2x = 1

So, cosec^2x – 1 = cot^2x.