If cosec + cot 0 = p, then prove that cos 0 = p2 - 1 /p2+1
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cosec A + cot A = p 1 / sinA + cosA / sinA = ப 1 + cosA = psinA இருபுறமும் சதுரம் (1 + cosA) ^ 2 = p ^ 2 (sinA) ^ 2 (1 + cosA) ^ 2 = p ^ 2 (1- (cos) ^ 2) (1 + cosA) ^ 2 = p ^ 2 (1- (cos)) (1 + cosA) 1 + cosA = p ^ 2 (1-cosA) cosA = (p ^ 2-1) / (p ^ 2 + 1) எனவே நிரூபிக்கப்பட்டது
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