What is the central angle of a sector with radius (9) cm and area (45\pi) sq cm?
Answer and explanation
Correct answer: (\frac{10\pi}{9})
Put (\frac{1}{2}r^2\theta=45\pi). From (\frac{81}{2}\theta=45\pi) we get (\theta=\frac{10\pi}{9}).
Frequently asked questions
What is the correct answer to this question?
(\frac{10\pi}{9})
Why is this the correct answer?
Put (\frac{1}{2}r^2\theta=45\pi). From (\frac{81}{2}\theta=45\pi) we get (\theta=\frac{10\pi}{9}).
Which subject and chapter does this question cover?
This is a Class 12 Mathematics question. Chapter: Trigonometric Functions. Topic: Angles.