Q. 2sin[(C+D)/2].cos[(C-D)/2] is equal to
A) cosC + cosD
B) sinC - sinD
C) sinC + sinD
D) cosC - cosD
✔ Correct Answer: sinC + sinD
Exam Insight
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A) cosC + cosD
B) sinC - sinD
C) sinC + sinD
D) cosC - cosD
✔ Correct Answer: sinC + sinD
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