if Cos A+Cos 2 A=1 THEN FIND Sin 2 A+Sin 4 A=?

Question

Nishant Vora · Answer

Hello Student, please find the solution: Cos A+Cos 2 A=1 => cosA = 1 &ndash; cos 2 A = sin 2 A So, Required is sin 2 A + sin 4 A = Cos A+Cos 2 A =1 I hope the solution is clear Thanks.

Eshika gupta · Answer

Since cos A + cos 2 A=1 Now,cosA= 1-cos 2 A=sin 2 A Then taking L.H.S. sin 2 A+sin 4 A =Sin 2 A(1+sin 2 A) =CosA(1+cosA) CosA+cos 2 A=1(given) L.H.S =1 Hence proved

Rishab · Answer

Cosa+cos^2=1 Cosa+1-sin2a=1 Cosa-sin2a=0 Cosa=sin2a Squaring both side Cos2a=sin4a Sin2a+sin4a=1 Sin2a+cos2a=1 1=1

Rahul ram · Answer

CosA+cos^2=1 CosA+1-Sin^2A=1 CosA-Sin^2A=0 CosA=Sin^2A Sq both side Cos^2A=Sin^4A 1-Sin^2A=Sin^4A 1=Sin^4A+Sin^2A Hence , Ans is 1....

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if Cos A+Cos 2 A=1 THEN FIND Sin 2 A+Sin 4 A=?

if Cos A+Cos2A=1 THEN FIND Sin2A+Sin4A=?

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