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If costheta + sintheta =root 2 …

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If costheta + sintheta =root 2 costheta then prove that costheta - sintheta =root2 sin theta

Posted by Neel Sagar 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Puja Sahoo? 6 years, 11 months ago

I'm taking A instead of theta.... cosA+sinA=root2 cosA.......... =>sinA=root2cosA-cosA...... =>sinA=cosA(root2-1).......... =>cosA=sinA/root2-1............ =>cosA=sinA(root2+1)/2-1.....(rationalise the denominator)......... =>cosA=root2sinA+sinA....... =>cosA-sinA=root2 sinA....... proved..?

3Thank You

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CBSE > Class 10 > Mathematics