Helpp!!Angles, degrees and, radians

Step-by-step explanation:

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1) angles ending in the same place are "co-terminal."

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2) The acute angle between the terminal ray and the x-axis is the "reference angle."

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3) Multiply radians by 180°/π to convert to degrees.

  a) π/2 × 180°/π = 180°/2 = 90°

  b) 7π/12 × 180°/π = (7/12)(180°) = 105°

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4) To convert from degrees to radians, multiply by π/180°.

  a) 360° × π/180° = 2π radians

  b) 315° × π/180° = 7π/4 radians

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step-by-step explanation: