Guest

if sinx+sin y=3(cosy -cosx),prove that sin3x+sin3y=0

if sinx+sin y=3(cosy -cosx),prove that sin3x+sin3y=0

Grade:11

1 Answers

PK NAIN
87 Points
7 years ago
first divide sinx+siny with cosy-cosx leaving only 3 on RHS and then apply the formulaes of sinc+sind and cosc-cosd  and cancel the terms and ultimately you get answer 

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