If tan theta = (20)/(21), then cos theta...

If `tan theta = (20)/(21),` then `cos theta` is equal to

A

`pm(20)/(41)`

B

`pm(1)/(21)`

C

`pm(21)/(29)`

D

`pm(20)/(21)`

Verified by Experts

The correct Answer is:

C

Similar Questions

Explore conceptually related problems

cos2theta is not equal to

If tan theta = (20)/(21) , then find the values of other trigonometric ratios .

If tan theta = (4)/(3) , then 3sin theta - 4 cos theta =

If 8 theta = pi, then cos 7 theta + cos theta is equal to ............ A) 0 B) 1 C) -1 D) 7

If sin theta = (20)/(29) , then find the value of cos theta .

If a tan theta = b, then a cos 2 theta+ b sin 2 theta = ............. A) a B) b C) -a D) -b

If 8theta=pi then cos7theta+costheta is equal to

If sin theta + sin^(2) theta=1 " then " cos^(2) theta+ cos^(4) theta is equal to

If sin theta = sqrt3 cos theta, then theta is equal to