Question

plzzzzzzzz solve this sum....​

Answer 1

Solution

$r.h.s.= (cot \: a \: - cosec \: a) {}^{2} \\ = ( \frac{cos \: a - 1}{sin \: a} ) {}^{2} \\ = \frac{(cos \: a - 1) {}^{2} }{sin {}^{2} \: a} \\ = \frac{(cos \: a - 1) {}^{2} }{1 - cos { }^{2} \: a} \\ = \frac{(cos \: a - 1) {}^{2} }{(1 - cos \: a)(1 + cos \: a)} \\ = \frac{(1 - cos \: a)}{(1 + cos \: a)} = l.h.s.(proved)$

hope this helps you.....xd