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Deepak Bora
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Asked: 2020-07-26T21:34:39+05:30 In:

Evaluate : { ( 3 sin 43° ) / ( cos 47° ) }² – { (cos 37° cosec 53°) / ( tan 5° tan 25° tan 45° tan 65° tan 85° )}

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CBSE 10th Class past year question paper

Year 2019

SET 1, Code Number- 30/2/1

Question number – 17

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      Evaluate : { ( 3 sin 43° ) / ( cos 47° ) }² – { (cos 37° cosec 53°) / ( tan 5° tan 25° tan 45° tan 65° tan 85° )}

      sinθ/cosθ =tanθ

      tan (90º – θ) = cot θ

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