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Thread: trig help?

  1. #1
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    trig help?

    i have to use either sin, cosine, or tangent?
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  2. #2
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    Re: trig help?

    $\sin(53deg)=\dfrac x {15}$
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  3. #3
    MHF Contributor

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    Re: trig help?

    You need to learn by heart:

    \sin(\theta) is "opposite leg divided by hypotenuse".
    \cos(\theta) is "near leg divided by hypotenuse".
    \tan(\theta) is "opposite leg divided by near leg".

    In your diagram the hypotenuse has length 15 and the side opposite the 53 degree angle has length x.
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