In Solution of Traingle, How doess a*cos 2 (C/2) + c*cos 2 (A/2)= 3b/2 become a(1+cosC) + c(1+cosA)=3b?

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Rinkoo Gupta · Answer

acos 2 (C/2)+c cos 2 (A/2)=3b/2 2acos 2 (C/2)+2ccos 2 (A/2)=3b a(1+cosC)+c(1+cosA)=3b Using formula 2cos 2 x=1+cos2x Thanks & Regards Rinkoo Gupta AskIITians Faculty

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In Solution of Traingle, How doess acos 2 (C/2) + ccos 2 (A/2)= 3b/2 become a(1+cosC) + c(1+cosA)=3b?

In Solution of Traingle,
How doess acos²(C/2) + ccos²(A/2)= 3b/2
become a(1+cosC) + c(1+cosA)=3b?

1 Answers

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In Solution of Traingle, How doess a*cos 2 (C/2) + c*cos 2 (A/2)= 3b/2 become a(1+cosC) + c(1+cosA)=3b?

In Solution of Traingle,How doess a*cos2(C/2) + c*cos2(A/2)= 3b/2become a(1+cosC) + c(1+cosA)=3b?

1 Answers

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In Solution of Traingle, How doess acos 2 (C/2) + ccos 2 (A/2)= 3b/2 become a(1+cosC) + c(1+cosA)=3b?

In Solution of Traingle,
How doess acos²(C/2) + ccos²(A/2)= 3b/2
become a(1+cosC) + c(1+cosA)=3b?