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3. A sector of a circle has area 8.1\pi cm$^2$ and central angle 60°. Find its radius You can use formulas: Area of sector = $\frac{1}{2}r^2\theta$ Arc length = $r\theta$ 4. If $\theta$ is a third quadrant angle and $cos \theta = -\frac{4}{5}$, find $sin \theta$

          3. A sector of a circle has area 8.1\pi cm$^2$ and central angle 60°. Find its radius
You can use formulas: Area of sector = $\frac{1}{2}r^2\theta$     Arc length = $r\theta$
4. If $\theta$ is a third quadrant angle and $cos \theta = -\frac{4}{5}$, find $sin \theta$

3. A sector of a circle has area 8.1πcm^2 and central angle 60°. Find its radius
You can use formulas: Area of sector = (1)/(2)r^2θ Arc length = rθ
4. If θ is a third quadrant angle and cos θ = -(4)/(5), find sin θ

Added by Shawn A.

Calculus: Early Transcendentals

James Stewart 8th Edition

Instant Answer

Solved by Expert Uma Kumari

11/10/2020

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1r cm and the central angle is 60 degrees. Show more…

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3.A sector of a circle has area 8.1r cm and central angle 60.Find its radius You can use formulas:Area of sector=g Arclength=r9 4.Iis a third quadrant angle and cos=find sin