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Trigonometry Properties of Triangles

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Which of the following is true in a triangle ABC

A. (b + c) sin (B - C)/2 = 2a cos A/2

B. (b + c) cos A/2 = 2a sin (B - C)/2

C. (b - c) cos A/2 = a sin (B - C)/2

D. (b - c) sin (B - C)/2 = 2a cos (A/2)

E. None of the above

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Correct choice: C

Explanation:

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Eamcet Mathematics Trigonometry Properties of Triangles

Eamcet Mathematics
Trigonometry Properties of Triangles