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If tan theta=20/21, then the value of (s...

If `tan theta=20/21`, then the value of `(sin theta-cos theta)/(sin theta+cos theta)` is:
यदि `tan theta=20/21`, है, तो `(sin theta-cos theta)/(sin theta+cos theta)` का मान क्या है ?

A

a)`-1/41`

B

b)`27/21`

C

c)`29/35`

D

d)`-29/31`

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