if f(x)= cos 2x then f'x=?by
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Answer:
-2sin(2x)
Step-by-step explanation:
Derivative of cos(2x):
First, take 2x = y:
Derivative of cos(y): -(dy/dx)(sin(y))
dy/dx = d(2x)/dx = 2:
-2sin(y): -2sin(2x)
Therefore answer is -2sin(2x)
Hope it helps!
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