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Principle Of Mathematical Induction

Question
CBSEENMA11014012

In any triangle ABC,

fraction numerator 2 cosA over denominator straight a end fraction plus cosB over straight b plus fraction numerator 2 cosC over denominator straight c end fraction equals straight a over bc plus straight b over ca comma then prove that the triangle is a right angled triangle.

Solution

Solution not provided.

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Find 1 radian angle in degrees, minutes, seconds.