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Math Help - Compound Angle Formulas Determining Exact Value of Trigonometric Ratio Help!?!?!?!

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    Compound Angle Formulas Determining Exact Value of Trigonometric Ratio Help!?!?!?!

    I am having alot of trouble with this particular question

    Determine the exact value of each trigonometric ratio.

    1) Tan 23pi/12

    answer in my book says 2 + square root 3

    Thank you
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  2. #2
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    Quote Originally Posted by TheCB4 View Post
    I am having alot of trouble with this particular question

    Determine the exact value of each trigonometric ratio.

    1) Tan 23pi/12

    answer in my book says 2 + square root 3

    Thank you
    For starters, the answer is meant to be negative since 23pi/12 lies in the 4th quadrant.

    Note that:

    1. \tan \frac{23 \pi}{12} = - \tan \frac{\pi}{12} by symmetry of the unit circle.

    2. \frac{\pi}{12} = \frac{\pi}{3} - \frac{\pi}{4} so using the compound angle formula is suggested ....
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    Hi but the main trouble i am having is using the compound angle formula of tan, do you think you can show me how to use it, it would be great?

    Quote Originally Posted by mr fantastic View Post
    For starters, the answer is meant to be negative since 23pi/12 lies in the 4th quadrant.

    Note that:

    1. \tan \frac{23 \pi}{12} = - \tan \frac{\pi}{12} by symmetry of the unit circle.

    2. \frac{\pi}{12} = \frac{\pi}{3} - \frac{\pi}{4} so using the compound angle formula is suggested ....
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  4. #4
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    Quote Originally Posted by TheCB4 View Post
    Hi but the main trouble i am having is using the compound angle formula of tan, do you think you can show me how to use it, it would be great?
    Please show all your work and say exactly where it is that you get stuck.
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