If an angle alpha be divided into two pa...

If an angle `alpha` be divided into two parts such that the ratio of tangents of the parts is K. If x be the difference between the two parts , then prove that `sinx = (K-1)/(K+1) sin alpha`.

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If an angle `alpha` be divided into two parts such that the ratio of tangents of the parts is K. If x be the difference between the two parts , then prove that `sinx = (K-1)/(K+1) sin alpha`.

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