Consider a triangle PQR having sides of lengths p, q and r opposite to the angles P, Q and R, respectively. Then which of the following statements is (are) TRUE ?

JEE Advanced 2021 Mathematics question

Consider a triangle having sides of lengths , and opposite to the angles , and , respectively. Then which of the following statements is (are) TRUE ?

Answer: (A),(B)

(A) , since – TRUE. (B) By the projection formula and ; adding, . The right side of (B) equals $ =

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Question ID VK-033936