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I need help with the following problem.

Given an acute triangle $ABC$. $BB_1$ and $ CC_1$ are the altitudes. If $\frac{B_1C_1} {C_1B} = \sqrt 2$ and $\angle ACB=75^{\circ}$, find the angles $\angle ABC$ and $\angle BAC$

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    (-1) No efforts... once again2012-06-22
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    No efforts? How do you know that? I have been trying to solve it for a few hours already...2012-06-22
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    Actually, I've just found $\angle BAC= 45$ and $\angle ABC=60$. Could anyone confirm it?2012-06-22
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    Well that's better2012-06-22
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    Your results are correct, you can write answer to your question. Other MSE users could benefit from it.2012-06-22

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