Guest

if tanx/tany=1+cos 2 x/1+sin 2 x show that sin(3x+y)=7sin(x-y).

if tanx/tany=1+cos2x/1+sin2x show that sin(3x+y)=7sin(x-y).

Grade:11

1 Answers

Vijay Mukati
askIITians Faculty 2590 Points
7 years ago
Hint: convert tanX and tanY into corresponding sin/cos form. Then apply componendo and dividendo.use the formulas of 2 sinAcosB and simplyfy it. Thanks.

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy

ASK QUESTION

Get your questions answered by the expert for free