Q. 3cosA is equal to
A) 4cos3A - 3cosA
B) 4cos3A + 3cosA
C) 3cos3A - 3cosA
D) 3cos3A + 3cosA
✔ Correct Answer: 4cos3A - 3cosA
Exam Insight
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A) 4cos3A - 3cosA
B) 4cos3A + 3cosA
C) 3cos3A - 3cosA
D) 3cos3A + 3cosA
✔ Correct Answer: 4cos3A - 3cosA
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