Hi, can anyone help me to prove this:

If the roots of the equation

are the cosine of the angles of a triangle

show that:

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- January 15th 2012, 01:32 PMrazemsoft21Roots of equation
Hi, can anyone help me to prove this:

If the roots of the equation

are the cosine of the angles of a triangle

show that: - January 15th 2012, 06:01 PMTKHunnyRe: Roots of equation
Well, you have three angles. Use them and see what happens.

, ,

You have a Law of Cosines.

Show us what you get.