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A,B and C are interior angles of a trian...

A,B and C are interior angles of a triangle ABC. Show that `sin[(B+C)/2]` = `cos (A/2)`.

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AGRAWAL PUBLICATION-(2019) QUESTION PAPER-EXAMPLE
  1. Prove that sqrt 3 is an irrational number.

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  2. Find the greatest number which on dividing 1251, 9377 and 15628 leaves...

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  4. If angle A = 90^@, then find the value of tan [(B + C)/2]

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