Question

If
3 cot A=4 check
whether 1-tan²A =COS²A-Sinza
It tanza​

Answer 1

1/tan3 –tan A — 1/cot 3A – cot A = cotton 2A

1/1/cot 3 _ 1/cot A —1/ cot A — cotA

cot 3A _cot A /cot A –cotton 3A _1/cot 3A

cot 3A cotton A+1/cot A - cotton 3A = Cot [3A–A]

Cot A = RHS..