Question

sin a * cos a/sin^2a - cos^2 a​

Answer 1

Ответ:

$\frac{sina\, \cdot cosa}{sin^2a-cos^2a}=\frac{\frac{1}{2}\, sin2a}{-cos2a}=-\frac{1}{2}\, tg2a$

Answer 2

I hope this helps you