JEE Advanced 2010 Mathematics question
Not in JEE syllabus
If the angles A, B and C of a triangle are in an arithmetic progression and if a, b and c denote the lengths of the sides opposite to A, B and C respectively, then the value of the expression is
Answer: (D)
Solution
Since A, B, C are in A.P., and give , so and . By the sine rule . Then $ 2C + 2A =
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