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trig

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In Rights Triangle ABC with C=90 degrees if a=4 and c=2square roots of 7, find SinA

  • trig -

    sinA = a/c = 4 / 2sqrt7 = 2 / sqrt7,
    Multiply numerator and denominator by
    sqrt of 7:

    sinA = 2sqrt7 / 7.

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