# 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

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