Question

express Tan0 in terms of cos0.​

Answer 1

tan θ  =  sin θ  / cos θ

tan θ =  ± √ 1 - cos²θ / cos theta

REPLACE θ BY 0

Answer 2

sec² theta - tan² theta = 1

tan² theta = sec² theta-1 = 1/cos² theta -1= 1-cos² theta /cos² theta tan theta = √1- cos theta/cos²theta(square root for whole) = ✓1-cos theta/cos theta(square root for only numerator).

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