Question

(sec2a-1)(cosec2a-1). evaluate​

Answer 1

Note:-

Tan²∅=sec²∅-1

Cosec∅=1/Sin²∅

ACCORDING TO THE QUESTION.....

(Sec²∅-1)(1-cosec²∅)

=(Tan²∅)(1-1/sin²∅)

=Tan²∅(Sin²∅-1/Sin²∅)

=Tan²∅(Cos²∅/sin²∅)

=Sin²∅/Cos²∅ (Cos²∅/sin²∅)

=Cancel Both

=1

Answer:-1

Thanks