Question

( 1+ cot ^2 ∅ )(sin^2 ∅)​

Answer 1

Answer:

(1+cot^2∅)(sin^2∅)

=(cosec^2∅)(sin^2∅) [since, 1+cot^2∅=cosec^2∅]

=(1/sin^2∅)(sin^2∅) [since, cosec^2∅=1/sin^2∅]

=1

ans