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यदि `theta=45^(@)` तो सिद्ध कीजिए कि `2 sin thetac ostheta=sin2 theta.`

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यदि `theta=45^(@)` तो सिद्ध कीजिए कि `2 sin thetac ostheta=sin2 theta.`
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Correct Answer - `(i)1/3,(ii)1/4sqrt((3)/(2))`
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