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Math Help - Finding the angle

  1. #1
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    Finding the angle

    Find the angle in Radians...

    A circle with a radius of 1.
    the point P giving the co-ordinates (-√3/2 , -1/2)

    So it rotates through the 1st and 2nd quadrant and ends in the 3rd at point P. The angle in the third I'm unsure of. I know that its already 180 degrees.

    would i solve the 3rd quadrant angle by finding it using cos θ A/H

    so it would be (-√3/2)/1 = -1.225?

    Thanks for any help.
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  2. #2
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    \displaystyle \theta = \frac{7\pi}{6}


    recommend you learn the unit circle ...

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  3. #3
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    Hey thanks for your help, much appreciated.
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