Thread: Optimisation problem: isoscles triangle inscribed in semi-circle
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Old July 5th, 2009, 12:10 AM
banana_banana banana_banana is offline
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Question > Optimisation problem: isoscles triangle inscribed in semi-circle
Quote:
Originally Posted by Grandad View Post
Hello banana_bananaLet the angle between the radii forming the two equal sides of the triangle be \theta. Then the area of the triangle is given by

A = \tfrac12.10^2\sin\theta = 50\sin\theta

\Rightarrow \frac{dA}{d\theta} = 50\cos\theta = 0 when \theta = \tfrac{\pi}{2}

Can you finish it now?

Grandad
How can i finish? I am quite confused about this ? Would you like to explain it better?
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