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August 24th, 2013, 01:19 PM  #1 
Member Joined: Aug 2013 Posts: 69 Thanks: 0  Two equals Sides. One Angle. In a CIRCLE.
Hi, To obtain the area of a a triangle inside a circle with radius 12. and angle pi/3 ( 60deg). A= 1/2 *b*h . = 1/2*12* h h= tan(30deg)*12 = this is correct> we can intersect pi/3 and use tan to equate the height? Zen. 
August 24th, 2013, 01:30 PM  #2 
Member Joined: Aug 2013 Posts: 59 Thanks: 0 
I just imagine a right triangle with angles 30°, 60° and 90°. cos(30°) = ?3/2 = h/12 i.e. h = 6?3. ? ½ x 12 x 6?3 = 6²?3 = 36?3. 

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angle, circle, equals, sides 
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