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If tan theta = (1)/(sqrt5) and theta lie...

If `tan theta = (1)/(sqrt5) and theta` lies in the first quadrant, the value of `costheta` is :

A

`sqrt((5)/(6))`

B

`-sqrt((5)/(6))`

C

`(1)/(sqrt6)`

D

`-(1)/(sqrt6)`

Text Solution

Verified by Experts

The correct Answer is:
A

`rArr cos theta = (sqrt5)/(sqrt6)`
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