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Principle Of Mathematical Induction

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$left parenthesis cosx minus cosy right parenthesis squared plus left parenthesis sinx minus siny right parenthesis squared space equals space 4 space sin squared open parentheses fraction numerator straight x minus straight y over denominator 2 end fraction close parentheses.$

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Some More Questions From Principle of Mathematical Induction Chapter

If in two circles, arcs of the same length subtend angles 60° and 75° at the centre, find the ratio of their radii.

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