Sine rule
Applications of trigonometry · Mathematics
Study notes
Q: In triangle ABC, A = 30°, B = 60°, a = 5. Find b and c. C = 90°. By sine rule: 5/sin30° = b/sin60° = c/sin90°. 5/0.5 = 10 = 2R. b = 10·sin60° = 5√3. c = 10·1 = 10.
One notebook for every subject — open it anywhere.
Applications of trigonometry · Mathematics
Q: In triangle ABC, A = 30°, B = 60°, a = 5. Find b and c. C = 90°. By sine rule: 5/sin30° = b/sin60° = c/sin90°. 5/0.5 = 10 = 2R. b = 10·sin60° = 5√3. c = 10·1 = 10.