Question

Evaluate: $3{\cot }^2\theta -3{\text{cosec}}^2\theta$

Answer 1

$3{\cot }^2\theta -3cose{c}^2\theta =-3(cose{c}^2\theta -{\cot }^2\theta )$

$=-3$

$\{cose{c}^2\theta -{\cot }^2\theta =1\}$.