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Show that tan^(-1)[(cosx+sinx)/(cosx-sin...

Show that `tan^(-1)[(cosx+sinx)/(cosx-sinx)]=(pi)/(4)+x`.

A

`-x`

B

`x`

C

`(pi)/(4)-x`

D

`(pi)/(4)+x`

Text Solution

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The correct Answer is:
D
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