If y = cos 3x, find δy/δx
MATHEMATICS
JAMB 2014
If y = cos 3x, find δy/δx
- A. 1/3sin3x
- B. −1/3sin3x
- C. 3 sin 3x
- D. -3 sin 3x
Correct Answer: D. -3 sin 3x
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