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Sin^2 20+sin^2 70- tan^2 45

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Sin^2 20+sin^2 70- tan^2 45

    • Posted by Megha Verma 7 years, 2 months ago

    CBSE > Class 10 > Mathematics
    • 1 answers

    Beauty Queen? Miss Sweetu? 7 years, 2 months ago

    Sin^2 20°+sin(90°-20°)-tan^2 45° Sin^2 20°+cos^2 20°-tan^2 45° Now ,. Sin2 A + cos2 A = 1 ( identity) And tan 45 °= 1 tan2 45°= 1^2 1 - 1 =0.

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