What is sin A cos A tan A + cos A cot A ...

What is sin A cos A tan A + cos A cot A equal to ?

A

`sin^2 A + cos A `

B

`sin^2 A + tan^2 A `

C

`sin^2 A + cot^2 A `

D

`cosec^2 A -cot^2 A`

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The correct Answer is:

D

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