SOLUTION: sec(A)+1)/(sec(A)-1)=cot^2(A/2)

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Question 968427: sec(A)+1)/(sec(A)-1)=cot^2(A/2)
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
Prove:
sec(A)+1)/(sec(A)-1)=cot^2(A/2)
%281%2Fcos%28A%29%2B1%29%2F%281%2Fcos%28A%29-1%29
%281%2Bcos%28A%29%29%2F%281-cos%28A%29%29

verified: left side=right side
note: cos%28A%2F2%29=sqrt%28%281%2Bcos%28A%29%29%2F2%29
sin%28A%2F2%29=sqrt%28%281-cos%28A%29%29%2F2%29