1.

sinC – sinD =(A) 2cos\(\frac{C+D}{2}\).sin\(\frac{C-D}{2}\)(B) 2sin\(\frac{C+D}{2}\).cos\(\frac{C-D}{2}\)(C) cos\(\frac{C+D}{2}\).sin\(\frac{C-D}{2}\)(D) sin\(\frac{C+D}{2}\).cos\(\frac{C-D}{2}\)

Answer»

Correct option is: (A) 2cos\(\frac{C+D}{2}\).sin\(\frac{C-D}{2}\)



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