Question

What's
the answer?????
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Answer 1

9514 1404 393

Step-by-step explanation:

Apparently, you're to show this is an identity.

`(\tan^2A)/(\tan A-1)+(\cot A)/(1-\tan A)=1+\sec A\csc A\\\\(\tan^2 A-(1)/(\tan A))/(\tan A-1)=\\\\(\tan^3 A-1)/((\tan A)(\tan A-1))=\\\\\\(\tan^2 A+\tan A+1)/(\tan A)=\\\\1+(\sec^2 A)/(\tan A)=\\\\1+(1)/(\cos A)\cdot(1)/(\sin A)=1+\sec A\csc A`