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

RIYAZSHAIK , 10 Years ago
Grade 11
anser 1 Answers
Sourabh Singh
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.
Last Activity: 10 Years ago
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