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Class 12 Mathematics Trigonometric Functions AnglesHardLevel 67

If (s=25\pi) cm and the central angle is (225^\circ), what is the radius?

Answer and explanation

Correct answer: (20) cm

(225^\circ=\frac{5\pi}{4}) and (r=\frac{s}{\theta}=\frac{25\pi}{5\pi/4}=20). Convert the angle to radians first.

Tags

trigonometric-functionsanglesarc-radius

Frequently asked questions

What is the correct answer to this question?

(20) cm

Why is this the correct answer?

(225^\circ=\frac{5\pi}{4}) and (r=\frac{s}{\theta}=\frac{25\pi}{5\pi/4}=20). Convert the angle to radians first.

Which subject and chapter does this question cover?

This is a Class 12 Mathematics question. Chapter: Trigonometric Functions. Topic: Angles.

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