SOLUTION: Prove sqrt{[(1+cosA)^2]+[sinA]^2}=2cos(A/2) Sqrt{(1+(cosA)^2+2cosA+(sinA)^2 Sqrt(2+2cosA) Sqrt(2*2(cosA/2)^2)) 2cosA/2

SOLUTION: Prove sqrt{[(1+cosA)^2]+[sinA]^2}=2cos(A/2) Sqrt{(1+(cosA)^2+2cosA+(sinA)^2 Sqrt(2+2cosA) Sqrt(2*2(cosA/2)^2)) 2cosA/2

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Question 896487: Prove sqrt{[(1+cosA)^2]+[sinA]^2}=2cos(A/2)
Sqrt{(1+(cosA)^2+2cosA+(sinA)^2
Sqrt(2+2cosA)
Sqrt(2*2(cosA/2)^2))
2cosA/2

Answer by nagatheja3636(1) (Show Source): You can put this solution on YOUR website!

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