Pre-Calculus/Trigonometry

Sketch an angle in standard position

7Pie Divided by 12

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  1. Unless you are really comfortable with radians, some students find it easier to think in degrees
    7pi/12 = 105º = 90+15
    so we are in the 2nd quadrant
    estimate and divide the 2nd quadrant right-angle into thirds, that would make each 30º
    Now divide the first of those from the vertical in half making that angle 15º
    So the 90 from quadrant I plus that 15 makes 105º or 7pi/12 radians

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    posted by Reiny
  2. 3-3 sin feda minus 2 cos squared equals zero

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    posted by eva

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