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March 29, 2017

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Determine the EXACT values of each of the following:
a) sin 240°
b) cos 135°

  • Math - ,

    sin 240

    1. where is the angle ? in quadrant III , so it is -
    2. How far away from the x-axis ? 60° (the angle in standard position)

    = - sin 60°
    = = √3/2 , (from the 30-60-90 triangle)

    see if you can the second one in the same way.

  • Math - ,

    small typo, answer should have said ....

    = - √3/2

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