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(1-tan^2 45^@)/(1+cot^2 A ) is equal to ...

`(1-tan^2 45^@)/(1+cot^2 A )` is equal to ……

A

`sin 0^@`

B

`sin 90^@`

C

`sin 45^@`

D

`sin 30^@`

Text Solution

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The correct Answer is:
A
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