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If cos+sin =√2cos,show that cos-sin=√2sin |
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Answer» - mane minus sign ko common lo - ko common le lo fir equate kro answer aa jayega (CosA+sinA)^2=(_/2 cosA)^2Cos^2A+sin^2A+2cosAsinA=2cos^2A1-sin^2A+1-cos^2A+2cosAsinA=2 (1-sin^2A) Squaring both sides krke kr lo ho jayega |
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