Question

In ∆ABC, if ∠A = 45º, ∠B = 60º then find the ratio of its sides.

Answer 1

By the sine rule,

∴ a : b : c = sinA : sinB : sinC

Given ∠A = 45° and ∠B = 60°

∵ ∠A + ∠B + ∠C = 180° 

∴ 45° + 60° + ∠C = 180°

∴ ∠C = 180° – 105° = 75°