2 tan theta equal to secant theta then 4 cos squared theta minus eight tan squared theta
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If sec theta -tan theta =4,then prove that cos theta=8/17 ... secθ = 17/4*2 = 17/8 we know that cosθ = 1/secθ = 1/(17/8)
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Hi !secθ - tanθ = 4 -----> (1)Multiplying and dividing by secθ +tanθ = secθ - tanθ ... More
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Answer:Step-by-step explanation: More
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Step-by-step explanation:
4cos squared - 8 = -4 cosec squared theta
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