The Total solution for NCERT class 6-12
Given: In ∆ABC, ∠C = 105o, ∠B = 45o, a =2
We know in a triangle,
∠A + ∠B + ∠C = 180°
∠A = 180° – ∠B – ∠C
Substituting the given values, we get
∠A = 180° – 45° – 105°
∠A = 30°
By using the sine rule, we get
