Trigonometry and trigonometry formulas multiple choice questions (MCQs), trigonometry and trigonometry formulas quiz answers 1 to learn elementary school math online courses. Cosine rule MCQs, trigonometry and trigonometry formulas quiz questions and answers for online elementary education degree. Cosine rule, sine rule and formula test for elementary school teaching certification.

Learn elementary school math MCQs: Cosine rule, sine rule and formula, with choices a² + b² - 2ab cos c, c² + a² + 2ac cos c, a² + b² + 2ab cos a, and a² - b² + 2ab sin a for online elementary education degree. Free math study guide for online learning cosine rule quiz questions to attempt multiple choice questions based test.

MCQ: For Cosine Rule of any triangle ABC, b² is equal to

1. a² - c² + 2ab cos A
2. a³ + c³ - 3ab cos A
3. a² + c² - 2ac cos B
4. a² - c² 4bc cos A

C

MCQ: For Cosine Rule of any triangle ABC, c² is equal to

1. c² + a² + 2ac cos C
2. a² + b² - 2ab cos C
3. a² + b² + 2ab cos A
4. a² - b² + 2ab sin A

B

MCQ: In a triangle ABC, if angle A = 72° , angle B = 48° and c = 9 cm then Ĉ is

1. 69°
2. 66°
3. 60°
4. 63°

C

MCQ: Considering Cosine Rule of any triangle ABC, possible measures of angle A includes

1. angle A is obtuse
2. angle A is acute
3. angle A is right-angle
4. all of above

D

MCQ: Sine rule for a triangle states that

1. a/sin A = b/sin B = c/sin C
2. sin A/a = sin B/b = sin C/c
3. a/sin A + b/sin B + c/sin C
4. 2a/sin A = 2b/sin B = 2c/sin C

B