In this video I show you how to simplify trigonometric identities by adding fractions. I begin this lesson by reminding you ...

You can do fractions on your iPhone calculator using two different methods. When you turn your iPhone calculator sideways — switching it to a scientific-calculator layout — you'll be able to use more ...

The iPhone, up through iOS 6, comes with a standard calculator application. When you hold your phone in portrait mode, with the home button at the bottom, then the display for the calculator shows ...

In this video I show you how to add, subtract, multiply and divide fractions by working through 52 different examples. I make ...