1.

If sinC - sinD = x, then value of x is1). 2sin[(C+D)/2]cos[(C-D)/2]2). 2cos[(C+D)/2]cos[(C-D)/2]3). 2cos[(C+D)/2]sin[(C-D)/2]4).2sin[(C+D)/2]sin[(D-C)/2]

Answer» 2COS[(C+D)/2]SIN[(C-D)/2] is the ANSWER


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