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Prove the following : (1-tan^2(45^@-A))/(1+tan^2(45^@-A)) = sin2A |
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Answer» Solution :L.H.S. `(1-tan^2(45^@-A))/(1+tan^2(45^@-A)) = COS2(45^@-A)` = COS(`90^@`-2A) = SIN2A= R.H.S. |
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