Question

Using trigonometric identities, write the following expressions as integer
3cot^2 A-3cosec^2 A​

Answer 1

$3 \cot {}^{2} a \: - \: 3csc {}^{2} a =$

$\csc {}^{2} a - \cot {}^{2} a = 1$

$- 3( \cot {}^{2} a - \csc {}^{2} a)$

$3( \csc {}^{2} a - \cot {}^{2} a)$

$3(1)$

= 3 Ans