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Math Help - Exact Values

  1. #1
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    Exact Values

    Okay. I have a quick question.

    If I have a hypotnuse of 13, and I know an angle is squareroot3/2 (cos 30) how do I find out the EXACT length of the adjacent side?
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  2. #2
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    Hello abc10
    Quote Originally Posted by abc10 View Post
    Okay. I have a quick question.

    If I have a hypotnuse of 13, and I know an angle is squareroot3/2 (cos 30) how do I find out the EXACT length of the adjacent side?
    I assume you mean the angle is 30^o, and its cosine is \frac{\sqrt3}{2}, in which case all you can do is to say that the length of the adjacent side is 13\cos 30^o = \frac{13\sqrt3}{2}. That's its exact value. Any attempt to write this as a decimal will give an approximate value.

    Grandad
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  3. #3
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    how about \frac{\sqrt{3}*13}{2} ?
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