Question

Can any kind soul help me please



Use the cosine rule​

Answer 1

M = 45°

Explanation:

a²=b²+c²-2bc Cos A

m² = n² + p² - 2np cos M

(5.1)² = (7.2)² + (5.3)² - 2(7.2)(5.3) cos M

26.01 = 51.84 + 28.09 - 76.32 cos M

-53.92 = -76.32 cos M

0.7065 = cos M

M =
`cos^(-1 )`(0.7065)

M = 45°