Determine the points in the interval (0, 2x) at which the graph of the function below has a horizontal tangent line. f(x) = 6 cos x + 3 sin 2x (x, y) = (smallest x-value) (х, у) 3D (x, y) = | (largest x-value) Need Help? Watch It Read It Master It

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Rate of Change

The relation between two quantities which displays how much greater one quantity is than another is called ratio.

Slope

The change in the vertical distances is known as the rise and the change in the horizontal distances is known as the run. So, the rise divided by run is nothing but a slope value. It is calculated with simple algebraic equations as: