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Ex 8.4, 3 (i) - Chapter 8 Class 10 Introduction to Trignometry (Term 1)

Last updated at Aug. 11, 2021 by

Ex 8.4, 3 - Evaluate (i) sin2 63 + sin2 27 / cos2 17 + cos2 73

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Ex 8.4, 3 Evaluate : ( sin2 63 + sin2 27 )/(cos2 17 + cos2 73 ) ( sin2 63 + sin2 27 )/(cos2 17 + cos2 73 ) = (sin2 (90 27) + sin2 27 )/(cos2 (90 73) + cos2 73 ) = (cos^2 (27 ) + sin2 27 )/(sin^2 (73 ) + cos^2 73 ) = 1/1 = 1 Hence, ( sin2 65 + sin2 27 )/(sin2 17 + sin2 73 ) = 1

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