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Prove that- tan-1 √x = (1/2) cos-1 ((1 - x)/(1 + x)). |
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Answer» L.H.S. = tan-1 √x = (1/2) (2 tan-1 √x) = (1/2) x cos-1 ((1 - (√x)2)/(1 + (√x)2)) = (1/2) cos-1 ((1 - x)/(1 + x)) = R.H.S |
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