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Thread: Difference Formula

  1. March 17th 2010, 06:09 PM #1
    purplec16
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    Difference Formula

    tan 105

    tan (60+45)

    \frac{tan 60 + tan 45}{1 - tan 60 tan 45}

    \frac{\sqrt{3}+1}{1-\sqrt{3}}

    -2-\sqrt{3}

    Is this correct?
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  2. March 17th 2010, 06:19 PM #2
    skeeter
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    Quote Originally Posted by purplec16 View Post
    tan 105

    tan (60+45)

    \frac{tan 60 + tan 45}{1 - tan 60 tan 45}

    \frac{\sqrt{3}+1}{1-\sqrt{3}}

    -2-\sqrt{3}

    Is this correct?
    check it with your calculator ... you have one, right?

    some things you need to check yourself.
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