Click to Chat
1800-2000-838
+91-120-4616500
CART 0
Use Coupon: CART20 and get 20% off on all online Study Material
Welcome User
OR
LOGIN
Complete Your Registration (Step 2 of 2 )
solve the equation Cosa+sin2a+cos3a=0
(cosa+cos3a)+sin2a=02cos2a.cosa+2sinacosa=02cosa(cos2a+sina)=0=> cosa=0 or cos2a+sina=0=>a=pi/2 or 1-2sin^2a+sina=02sin^2a-sina-1=0sina={1+-sqrt(1-4(2)(-1))}/2(2)=>sina=1,-1/2=>a=pi/2 and 7pi/6hence a=pi/2,7pi/6Thanks & regardsRinkoo GuptaAskIITians Faculty
Find solution of question on doubt solving app Instasolv
Post Question
Dear , Preparing for entrance exams? Register yourself for the free demo class from askiitians.
points won -