A function does not have an "angle of inclination"! I assume you mean "the angle of inclination with the x-axis of the tangent to the curve at any point".
If is the angle the tangent line to y= f(x) makes with x-axis than .
A function does not have an "angle of inclination"! I assume you mean "the angle of inclination with the x-axis of the tangent to the curve at any point".
If is the angle the tangent line to y= f(x) makes with x-axis than .