Find the Reference Angle 111

Problem

111

Solution

1. Identify the quadrant in which the given angle θ=111 lies. Since 90<111<180 the angle is in Quadrant II.

2. Apply the formula for the reference angle θ′ in Quadrant II, which is θ′=180−θ

3. Subtract the given angle from 180 to find the result.

180−111=69

Final Answer

θ′=69

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