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If tantheta=(sinalpha-cosalpha)/(sinalph...

If `tantheta=(sinalpha-cosalpha)/(sinalpha+cosalpha)`, then `sinalpha+cosalpha` and `sinalpha-cosalpha` is equal to

A

`sqrt2costheta,sqrt2sintheta`

B

`-sqrt2sintheta,-sqrt2costheta`

C

`sqrt2sintheta,sqrt2sintheta`

D

`sqrt2costheta,sqrt2costheta`

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