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Thread: Tan equivalence

  1. March 23rd 2011, 11:43 AM #1
    AlyoshaKaz
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    Tan equivalence

    how does

    tan(\frac{5}{4}) = tan(\frac{1}{4})

    Thanks.
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  2. March 23rd 2011, 12:00 PM #2
    Phugoid
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    They are not equal. What gave you the impression that they were?
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  3. March 23rd 2011, 12:20 PM #3
    Quacky
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    I believe that you meant to ask 'how does tan(\frac{5\pi}{4})=tan(\frac{\pi}{4})

    Look at the graph of tan(x):
    Tan - Wolfram|Alpha
    It repeats itself every \pi radians. Do you understand why this is the case?
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