# In ΔABC, a = 3, b = 4 and sin A = 34, find ∠B - Mathematics and Statistics

Sum

In ΔABC, a = 3, b = 4 and sin A = 3/4, find ∠B

#### Solution

By sine rule,

"a"/(sin "A") = "b"/(sin "B")

∴ 3/(3/4) = 4/(sin "B")

∴ sin B = 1 = sin  pi/2

∴ ∠B = pi/2

Concept: Solutions of Triangle
Is there an error in this question or solution?