8 Triangle \(A B C\) has sides of length \(( m - n ) , m\) and \(( m + n )\) where \(0 < 2 n < m\)
Angle \(A\) is the largest angle in the triangle.
8
- Explain why angle \(A\) must be opposite the side of length \(( m + n )\).
8
- (ii) Using the cosine rule, show that \(\cos A = \frac { m - 4 n } { 2 ( m - n ) }\)
8 - You are given that \(B C\) is the diameter of a circle, and \(A\) lies on the circumference of the circle. The value of \(m\) is 8
Calculate the value of \(n\).