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.