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If costheta-sintheta=sqrt(2)sintheta the...

If `costheta-sintheta=sqrt(2)sintheta` then Prove that `costheta+sintheta=sqrt(2)costheta`

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lf costheta-sintheta=sqrt2sintheta prove that costheta+sintheta=sqrt2costheta .

If costheta+sintheta=sqrt(2)costheta , prove that costheta-sintheta=sqrt(2)sintheta .

If sintheta +costheta =sqrt(2) costheta then prove that costheta -sintheta=sqrt(2) sintheta

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If costheta+sintheta=sqrt(2)costheta, show that costheta-sintheta=sqrt(2)sintheta

If costheta+sintheta=sqrt(2)costheta, show that costheta-sintheta=sqrt(2)sintheta

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if costheta+sintheta=sqrt2 costheta, prove that costheta-sintheta=sqrt2sintheta