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If sintheta=costheta then 2tan^(2)theta+...

If `sintheta=costheta` then `2tan^(2)theta+sin^(2)theta-1=___`.

A

`(-3)/(2)`

B

`(3)/(2)`

C

`(2)/(3)`

D

`(-2)/(3)`

Text Solution

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The correct Answer is:
B
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