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# More Help with Trig

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Triangle $$ABC$$ is isosceles with $$\overline{AB} = \overline{AC}$$ and $$D$$ is the midpoint of $$\overline{AB}$$. If $$\angle BCD = \angle BAC = \theta,$$ then find $$\cos \theta.$$

Jan 1, 2020

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By the Law of Cosines on triangle ABC, cos theta works out to 2/3.

Jan 1, 2020
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Sorry, but this answer is incorrect. Can you show how you got that?

MathCuber  Jan 2, 2020
edited by MathCuber  Jan 2, 2020
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