(1+tan^2 A)/(1+cot^2 A) =?...

`(1+tan^2 A)/(1+cot^2 A) =?`

A

`(sec^2 A)/(cosec^2 A)`

B

`tan^2 A`

C

`cot^2 A`

D

Both A and B

Verified by Experts

The correct Answer is:

D

(1+tan^2 A)/(1+cot^2 A) =?
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cot A=(1)/(2)(cot((A)/(2))-tan((A)/(2)))
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((1+tan^2A)/(1+cot^2A))=((1-tanA)/(1-cotA))^2=tan^2A
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