Asked by Robin
For what values of x with 0¡Üx¡Ü2¦Ð does the graph of f(x)=x+4sin(x) have a horizontal tangent?
Answers
Answered by
Steve
f(x) = x+4sin x
f'(x) = 1 + 4cos x
So, where is cos x = -1/4?
f'(x) = 1 + 4cos x
So, where is cos x = -1/4?
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