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11 December, 14:32

Sin70cos10-cos70sin10

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  1. 11 December, 14:44
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    We know that sin (a-b) = sina. cosb - cosa. sinb

    if a=70 & b=10 the sin (70-10) = sin (60) = √3/2

    Sin70cos10-cos70sin10 = sin60 = √3/2
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