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If tantheta=7/8, the value of {(1+sinth...

If `tantheta=7/8`, the value of `{(1+sintheta)(1-sintheta)}/{(1+costheta)(1-costheta)}=`

A

`7/8`

B

`8/7`

C

`64/49`

D

`49/64`

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