MHT CET 2025 Mathematics question

Not in JEE syllabus

With usual notations, in , the lengths of two sides are 10 cm and 9 cm. If angles A, B, C are in A.P. then perimeter of ABC is

Answer: (B)

Solution

Angles in A.P. give and , so . Take the side opposite as and another side . Cosine rule: . Both roots are positive; the one matching the

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Question ID VK-102578