Prove the identity. cotx cos.x+ sinx = cscx

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A: We use Trigonometry identities  Sin(2A) = 2 sin(A) cos(A)

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A: Here I am attaching image so that you understand each and every step.

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Q: Choose the expression that completes the following equation so that it is an identity. tanx+cotr = O…

A: Given,  tan(x)+cot(x)=sin(x)cos(x)+cos(x)sin(x)                        =sin2(x)+cos2(x)cos(x).sin(x)…