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If tantheta=3/4 , then cos^2theta-sin^2t...

If `tantheta=3/4` , then `cos^2theta-sin^2theta=` `7/(25)` (b) `1` (c) `-7/(25)` (d) `4/(25)`

A

`3/25`

B

`4/25`

C

`7/25`

D

`9/25`

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