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Multiple Choice
Convert the angle −65π from radians to degrees.
A
−120°
B
−150°
C
−210°
D
−240°
Verified step by step guidance
1
Step 1: Recall the formula for converting radians to degrees: \( \text{Degrees} = \text{Radians} \times \frac{180}{\pi} \). This formula helps us convert an angle given in radians to its equivalent in degrees.
Step 2: Substitute the given angle \( -\frac{5\pi}{6} \) into the formula. The calculation becomes \( \text{Degrees} = -\frac{5\pi}{6} \times \frac{180}{\pi} \).
Step 3: Simplify the expression by canceling \( \pi \) in the numerator and denominator. This leaves \( \text{Degrees} = -\frac{5}{6} \times 180 \).
Step 4: Perform the multiplication \( -\frac{5}{6} \times 180 \). This involves multiplying \( 180 \) by \( -5 \) and then dividing the result by \( 6 \).
Step 5: The result of the calculation gives the angle in degrees. Compare this value to the provided options (\( -120\degree \), \( -150\degree \), \( -210\degree \), \( -240\degree \)) to identify the correct answer.