### Home > CALC > Chapter 6 > Lesson 6.4.2 > Problem6-145

6-145.

What is the best linear approximation of the general function $y =\operatorname{sin}(ax)$ near $x = 0$?

Recall that a linear approximation is the equation of a secant line on a curvy function when you 'zoom in' on a given point until the graph appears to be linear. This is almost the same as a _________________________________________________.