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Simplify the expression using trigonometric identities:

Simplify the expression using trigonometric identities:-example-1
User Paulkernfeld
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1 Answer

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Answer

D. 2 sinx / (1-cos x)

Explanation:


(sec x*sin(-x)+tan (-x))/(1+sec(-x)) \\=((1)/(cos x)*(-sin x)-(sin x)/(cos x) )/(1-(1)/(cos x) )\\=(-sin x-sin x)/(cos x -1) \\=(-2sin x)/(cos x -1) \\=(2sin x)/(1-cos x)

User Binier
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