Again the same

Geometry Level 4

\[x^3-24x^2+180x-420=0\]

A \(\triangle ABC\) has side lengths \(a\), \(b\) and \(c\), which are also the roots of the equation above. Find \(a(\cos C+\cos B)+b(\cos C+\cos A)+c(\cos A+\cos B)\). Give your answer to two decimal places.


Inspiration.

×

Problem Loading...

Note Loading...

Set Loading...