2cos(a+b)cos(a-b)=1 so prove that tan^2=1-tan^2(b)/1+3tan^2(b)

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2cos(a+b)cos(a-b)=1 so prove that tan^2=1-tan^2(b)/1+3tan^2(b)

2cos(a+b)cos(a-b)=1 so prove that tan^2=1-tan^2(b)/1+3tan^2(b)

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2cos(a+b)cos(a-b)=1 so prove that tan^2=1-tan^2(b)/1+3tan^2(b)

2cos(a+b)cos(a-b)=1 so prove that tan^2=1-tan^2(b)/1+3tan^2(b)

2 Answers

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