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27 April, 13:40

If sin a = 5/13 what is cos a

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  1. 27 April, 15:25
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    SIN (a) = G/H = 5/13

    A^2 + G^2 = H^2 - -> A = √ (H^2 - G^2) = √ (13^2 - 5^2) = 12

    COS (a) = A/H = 12/13
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