Express cosA in terms of cotA
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I think this is ur answer
but check please
but check please
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sec^2A = 1 + tan^2A
1/cos^2A = 1 + 1/cot^2A
= (cot^2A + 1)/ cot^2A
cos^2A = cot^2A / (cot^2A + 1)
cosA = cotA/ (cot^2A + 1)^1/2
1/cos^2A = 1 + 1/cot^2A
= (cot^2A + 1)/ cot^2A
cos^2A = cot^2A / (cot^2A + 1)
cosA = cotA/ (cot^2A + 1)^1/2
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