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Math Help - Idle curiousity

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    Idle curiousity

    How do I evaluate a trig function like sin(4) without a calculator? Assuming that, since there is no unit, it's 4 radians...
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    Re: Idle curiousity

    Quote Originally Posted by Nervous View Post
    How do I evaluate a trig function like sin(4) without a calculator? Assuming that, since there is no unit, it's 4 radians...

    I would look it up in a trig table.
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    Re: Idle curiousity

    How would I construct a trig table?
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    Re: Idle curiousity

    Quote Originally Posted by Nervous View Post
    How would I construct a trig table?
    http://www.math.rutgers.edu/~cherlin...2000/hunt.html
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    Re: Idle curiousity

    Although it is NOT the way trig tables are constructed, the simplest thing to do is to use "MacLaurin" series for sin(x):
    sin(x)= x- \frac{x^3}{3!}+ \frac{x^5}{5!}- \frac{x^7}{7!}+ \cdot\cdot\cdot+ \frac{x^{2n+1}}{(2n+1)!}+ \cdot\cdot\cdot
    Last edited by HallsofIvy; December 6th 2012 at 04:56 PM.
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