Question

31. (cot A - cosec A)2 =
1 -cos A
1+cos A
12​

Answer 1

GOOD MORNING

LHS

=(cosec A-cot A) ²

=(1/sinA-cosA/sinA) ²

= (1-cos A) ²/sin ²A

= (1-cos A) ²/1-cos²A

= (1-cos A) (1-cos A/ (1+cosA) (1-cos A)

=1-cos A/1+cos A [RHS]