In ∆ABC, if a = 18, b = 24 and c = 30 and ∠C = 90o, find sin A, sin B and sin C.
Let a, b, c be the sides of the given triangle. Then by applying the sine rule, we get
Now substituting the given values we get
Similarly,
Now substituting the given values we get
And given ∠C = 90°, so sin C = sin 90° = 1.
Hence the values of sin A, sin B, sin C are respectively