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If cos+sin =√2cos,show that cos-sin=√2sin

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If cos+sin =√2cos,show that cos-sin=√2sin

Posted by Amant Singh 6 years, 9 months ago

CBSE > Class 10 > Mathematics

4 answers

Amaresh Basu 6 years, 9 months ago

- mane minus sign ko common lo

Amaresh Basu 6 years, 9 months ago

- ko common le lo fir equate kro answer aa jayega

Amaresh Basu 6 years, 9 months ago

(CosA+sinA)^2=(_/2 cosA)^2 Cos^2A+sin^2A+2cosAsinA=2cos^2A 1-sin^2A+1-cos^2A+2cosAsinA=2 (1-sin^2A)

Amaresh Basu 6 years, 9 months ago

Squaring both sides krke kr lo ho jayega

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