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If y = 3 cos 4x, dy/dx equals
Classroom
Mathematics Classroom
Jamb
Jamb 2009
CALCULUS
Differentiation
Trigonometric Functions
More Topics
If y = 3 cos 4x, dy/dx equals
SchoolNGR Classroom
Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE
A
6 sin 8x
B
-24 sin 4x
C
12 sin 4x
D
-12 sin 4x
Show Answer
Show Explanation
Correct Answer:
Option D
Explanation:
y = 3 cos 4x
dy/dx = 3x -4 sin 4x
= -12sin 4x
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