Question 36
DifferentiationIf y = 3 cos 4x, dy/dx equals
- A.6 sin 8x
- B.−24 sin 4x
- C.12 sin 4x
- D.−12 sin 4x
Show the answer and explanation
Answer: D (−12 sin 4x)
Explanation
dy/dx = 3 × (−sin 4x) × 4 = −12 sin 4x.
If y = 3 cos 4x, dy/dx equals
Answer: D (−12 sin 4x)
dy/dx = 3 × (−sin 4x) × 4 = −12 sin 4x.