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

Palash Agarwal , 10 Years ago
Grade 12
anser 1 Answers
Rinkoo Gupta

Last Activity: 10 Years ago 

acos2(C/2)+c
cos2(A/2)=3b/2
2acos2(C/2)+2ccos2(A/2)=3b
a(1+cosC)+c(1+cosA)=3b
Using formula
2cos2x=1+cos2x

Thanks & Regards
Rinkoo Gupta
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