An inverse function graphing calculator will allow you to graph functions quickly and precisely, which will help you visualize how these graphs behave.

An inverse function graphing calculator will allow you to graph functions quickly and precisely, which will help you visualize how these graphs behave.

On the surface, the default iOS Calculator app seems very simple. But, there are a few tricks up the Calculator app's sleeve.

"Or use the scientific calculator for exponential, logarithmic, and trigonometric functions," according to Apple.