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Class 12 Mathematics Trigonometric Functions AnglesHardLevel 68

If a sector with angle (2) radians has arc length (18) cm, what is its area?

Answer and explanation

Correct answer: (81) square cm

From (s=r\theta), (r=9), then (A=\frac{1}{2}r^2\theta=81). In exams, find the radius first.

Tags

trigonometry angles sector area hard class11

Frequently asked questions

What is the correct answer to this question?

(81) square cm

Why is this the correct answer?

From (s=r\theta), (r=9), then (A=\frac{1}{2}r^2\theta=81). In exams, find the radius 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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