If a=3,b=4 and c=5, find cos A, cos B and cos C.

Explanation

To find the values of cos A, cos B, and cos C for a triangle with sides \( a = 3 \), \( b = 4 \), and \( c = 5 \), we will use the cosine rule, which states:

\[ \cos A = \frac{b^2 + c^2 - a^2}{2bc} \]
\[ \cos B = \frac{a^2 + c^2 - b^2}{2ac} \]
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