Some Help with Trig Functions and some basic differential calculus?

Why does the sine and cosine functions repeat every 2pi and tangent every 1pi when graphed?

Also, completely off topic, could someone please explain to me how the 1st derivative of x^2 is 2x? If this is hard to explain...perhaps a link to a easy-to-understand site.

I'm trying to learn calculus on my own and I have a very scattered background. Any help would be appreciated. Thanks

3 Answers

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  • 1 decade ago
    Favorite Answer

    http://www.sosmath.com/calculus/calculus.html

    I highly recommend this site, but I also highly recommend "Calculus for Dummies", not that you are one, of course.

  • 1 decade ago

    The period of sine and cosine is understood to be 2pi, while the period of tan is understood to be pi, on a basic graph. It is just something you learn. The other one i cant help u with sorry.

  • 1 decade ago

    Yikes, trig!!

    I am hiding under my desk in fright

    Source(s): sorry I can't help you
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