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The value of cos 2 theta in terms of co...

The value of `cos 2 theta ` in terms of `cot theta ` is ________

A

`(cot^(2)theta+1)/(cot^(1)theta-1)`

B

`(1+ cot^(2) theta)/(cot^(2)theta-1)`

C

`(cot^(2)theta-1)/(cot^(2)theta+1)`

D

`(1- cot^(2) theta )/(1+cot^(2) theta )`

Text Solution

Verified by Experts

The correct Answer is:
C
Use `cos 2 theta =(1- tan^(2) theta )/(1+ tan^(2) theta )`.
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