Question

cos(0°) find reference angle

Explanation:

Step1: Analyze the angle

The angle \(0^{\circ}\) is in the first - quadrant.

Step2: Recall the formula for reference angle

For an angle \(\theta\) in the first - quadrant (\(0\leq\theta\leq90^{\circ}\)), the reference angle \(\theta_{r}=\theta\).

Answer:

The reference angle of \(0^{\circ}\) is \(0^{\circ}\)