Question

37) cot²A.cosec²B-cot²B.cosecA=cot²A-cot²B​

Answer 1

Answer:

Step-by-step explanation:

Answer 2

Answer:

L.H.S. :

= cot^2 A . cosec^2 B - cot^2 B . cosec^ A

= cot^2 A (1 + cot^2 B) - cot^2 B(1 + cot^2 A)

= cot^2 A + cot^2 A cot^2 B - cot^2 B - cot^2 B cot^2 A

= cot^2 A - cot^ B = R.H.S.

Hence proved.