what is the reference angle of -13pi/3?

4 Answers

  • pi/3

    You can use -13 to determine the quadrant the angle is in.

  • -13 pi / 3 is - 4 1/3 pi, two full times around plus pi/3 but in a clockwise direction so the reference angle would be pi/3

  • ✰Answer✰

    60 degrees

    ✐Derivation✐

    Know that:

    Reference angle - angle formed by the coterminal ray and x-axis.

    So

    -13π/3 = -13(180)/3 = -780

    1080 - 780 = 300

    360 - 300 = 60

  • Whatever floats your boat.

    Your Welcome,

    MuiscMan

    ps i like cherry pi

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