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Math Help - [SOLVED] Solving Expressions .. Help!

  1. #1
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    [SOLVED] Solving Expressions .. Help!

    A simple expression i'm having trouble with because I have forgotten some basic rules to math.

    "Find the exact value for each of the following expressions"

    Sin(Pi/4)-Cos(Pi/6)+tan(Pi/3)

    = sqrt2/2 - sqrt3/2 + sqrt3

    This is where i'm stuck because I forget if you can multiply each term to have a common denominator. I ended up with:

    sqrt2 + sqrt3 / 2

    Help?
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  2. #2
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    Joined
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    Quote Originally Posted by MathNoobie View Post
    A simple expression i'm having trouble with because I have forgotten some basic rules to math.

    "Find the exact value for each of the following expressions"

    Sin(Pi/4)-Cos(Pi/6)+tan(Pi/3)

    = sqrt2/2 - sqrt3/2 + sqrt3

    This is where i'm stuck because I forget if you can multiply each term to have a common denominator. I ended up with:

    sqrt2 + sqrt3 / 2

    Help?
    So far you are correct:

    \frac{\sqrt{2}}{2} - \frac{\sqrt{3}}{2} + \sqrt{3}

    and then:

    \frac{\sqrt{2}}{2} - \frac{\sqrt{3}}{2} + \sqrt{3} = \frac{\sqrt{2}}{2} - \frac{\sqrt{3}}{2} + \frac{2 \sqrt{3}}{2} = \frac{\sqrt{2}-\sqrt{3}+2\sqrt{3}}{2} = \frac{\sqrt{2} + \sqrt{3}}{2}
    Last edited by yOdA; February 23rd 2008 at 11:10 AM.
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