SOLUTION: show that (cosa+sina)/(cosa-sina)-(cosa-sina)/(cosa+sina)=2tan2a

SOLUTION: show that (cosa+sina)/(cosa-sina)-(cosa-sina)/(cosa+sina)=2tan2a

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Question 1058160: show that (cosa+sina)/(cosa-sina)-(cosa-sina)/(cosa+sina)=2tan2a
Answer by solve_for_x(190) (Show Source): You can put this solution on YOUR website!

Multiplying each term to get a common denominator on the left side gives:

Dividing both the numerator and the denominator by gives:

But , so

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