SOTHardQuestion 200054
Question
In a triangle ABC, if a = 2, b = 3 and C = 60°, then c equals:
- A√7Correct
- B√13
- C√5
- D√10
Correct answer
√7
Explanation
By cosine rule: c² = a² + b² − 2ab cos C = 4 + 9 − 2(2)(3)(1/2) = 13 − 6 = 7. So c = √7.
JEE Mathematics · Hard
Trigonometry: SOT MCQ
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