Trigonometric Functions Practice Questions Ques3
Question: What is the radian measure of a central angle that subtends an arc length equal to the radius of the circle?
Options:
(A) 1 radian
(B) π radians
(C) 2 radians
(D) $\frac{\pi}{2}$ radians
Show Answer
Answer: A
Explanation:
(A) Correct. By definition, 1 radian is the measure of a central angle that subtends an arc length equal to the radius of the circle.
(B) Incorrect. π radians is equivalent to 180°.
(C) Incorrect. 2 radians is not a standard angle measure.
(D) Incorrect. $\frac{\pi}{2}$ radians is equivalent to 90°.
BETA
