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Thread: evaluate 23pi/6

  1. January 20th 2010, 10:56 PM #1
    thisisamazing
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    evaluate 23pi/6

    Don't use a calculator and use the rations in the reference triangle.
    please explain in detail how you got it!
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  2. January 21st 2010, 06:15 AM #2
    HallsofIvy
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    Quote Originally Posted by thisisamazing View Post
    Don't use a calculator and use the rations in the reference triangle.
    please explain in detail how you got it!
    Do you understand that a "reference triangle" has angles between 0 and \pi/2? Also, that sine and cosine are periodic with period [itex]2\pi[/itex]. Once you realize that, it is just elementary arithmetic. What is 23/6 as a mixed fraction?
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