Trigonometric System

For discussing Olympiad Level Algebra (and Inequality) problems
rflbboy
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Joined:Tue May 14, 2013 5:26 pm
Trigonometric System

Unread post by rflbboy » Tue May 14, 2013 5:36 pm

\begin{cases}sin(x)+sin(y)=a\\tg(x)+tg(y)=b\\sec(x)+sec(y)=c\end{cases}

Answer:
4c(2c-ab)=a(a^2-b^2)^2

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