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If costheta-sintheta=1/5, where 0 lt the...

If `costheta-sintheta=1/5,` where 0 lt `theta lt pi/4, then` Column I Column II `(costheta+ sintheta)//2` p. `4/5` `sin2theta` q. `7/(10)` `cos2theta` r. `(24)/(25)` `costheta` s. `7/(25)`

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