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Trigonometry Exercises: Oblique Triangle

Solve the following using the law of sine.

1. A = 47°, a = 75, b = 46. Find angle B.
2. C= 81°, c = 6, b = 3. Find angle B.
3. C = 86°, c = 31, a = 13. Find angle A.
4. A = 44°, B = 12®, a = 8. Find side b.
5. B = 8°, C = 120®, c = 12. Find side b.

Solve the following using the law of cosine.

1. a = 7, b = 6, c = 7. Find A.
2. a = 15, b = 15, c = 15. Find C.
3. A = 46°, b = 71, c = 88. Find side a.
4. B = 11°, c = 11, a = 33. Find side b.
5. a = 12, b = 18, c = 22. Find angle C.

Solve the following using the law of tangent.

1. C = 40°, a = 43, b = 17. Find angle A.
2. A = 51°, b = 95, c = 89. Find angle B.
3. B = 28°, a = 35, c = 24. Find angle A.
4. C = 102°, a = 29, b = 12. Find angle A.
5. A = 120°, b = 30, c = 25. Find angle B.

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