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IN A TRIANGLE ABC PROVE THAT SIN (B-C)/2 = (b-c)/2 COS A/2 ?

 
SIN (B-C)/2 = (b-c)/2 COS A/2 ?

Grade:11

1 Answers

Sourabh Singh IIT Patna
askIITians Faculty 2104 Points
6 years ago
Tqake cos to the left hand side and expand the numerator and denomination . You will ge the answer and it will be equal to he rhs.

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