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OpenStudy (anonymous):
suppose an isosceles triangle ABC has A=pi/4 and b=c=3. What is the length of a^2?
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OpenStudy (owlcoffee):
Try using the pythagorean theorem.
OpenStudy (blockcolder):
Law of Cosines: \[a^2=b^2+c^2-2bc\cos{A}\]
OpenStudy (anonymous):
Answer is 3^2(2- sqrt2)
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