Question

Cosine rule problem.

Answer 1

111

Explanation:

a² = b² + c² - 2bc cos A

a² = (7√3)² + (√6)² - 2(7√3)(√6) cos 45°

a² = 49 × 3 + 6 - 14√18 × (√2)/2

a² = 153 - 42

a² = 111

a = √111

a = √n = √111

n = 111