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11 August, 19:37

Consider triangle ABC, where angle C is a right angle. Without consulting a calculator, let sin (53°) = 0.7986. Enter the angle measure B, in degrees, for COS (B) = 0.7986

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  1. 11 August, 19:57
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    We have a right triangle.

    Then:

    A+B+C=90

    dа ta:

    C=90º

    A=53º

    Therefore:

    53º+B+90º=180º

    B=180º-53º-90º

    B=37º

    Answer: B=37º

    To check:

    Cos 37º=0.79863551 ... ≈0.7986
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