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Let O represent the origin and P be the point (9, -4). Find the positive angle (counterclock wise direction)that the line segment OP makes with the positive x-axis.

the answer is 5.86 radians but i keep getting 0.418 radian. please help and show work

  • Trig -

    Isn't your angle in the fourth quadrant?

    Your angle in standard position (the corresponding angle if the triangle had been in the first quadrant is inversetan(4/9) which is .418

    so your angle in the 4th quadrant is 2pi - .418 = 5.865

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