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Using induction, prove that, costhetac...

Using induction, prove that,
`costhetacos2thetacos2^(2)theta . . .cos2^(n)theta=(sin2^(n+1)theta)/(2^(n+1)sintheta)`.

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The correct Answer is:
`nge0`
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CHHAYA PUBLICATION-MATHEMATICAL INDUCTION -Sample Questions for Competitive Exams
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