Really hard problem with cos rule

Really hard problem with cos rule

Postby kate » Fri Jul 04, 2008 2:09 pm

We have the triangle ABC with angle β = 60°, a + c = 11, where a and c are sides of the triangle and c is bigger than a, and the radius of the inscribed circumference is r = 2/√3. Find a, b, c and h - the height towards the side a.
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