Area of a Circle

Geometry Level 2

how much is the circumference of the circle?

tan 60 sin 30 cos 60 sin 60

Tanon Kaewsongpol by Tanon Kaewsongpol , 32, Thailand

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1 solution

Syed Baqir
Sep 3, 2015

Circumference =

2 π ( 1 π ⋅ cos ⁡ ( 30 ) 2 ) = sin ⁡ ( 60 ) 2\pi \left(\frac{\frac{1}{\pi }\cdot \cos \left(30\right)}{2}\right)=\sin \left(60\right)

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