Question

If A, B and C are the
Interior angles of a triangle then Cos(B+C2) is equal
to​

Answer 1

Answer:

If A, B and C are interior angles of a triangle ABC, then show that sin((B+C)/2)=cos(A/2). ∴cosA2=sin(B+C2)=L. H

Step-by-step explanation:

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Answer 2

Answer:

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