Convert 90°

A quarter turn of the circle is $\displaystyle 90^{\circ}$, $\displaystyle \frac{\pi}{2}$ radians, or 100 grads. The 2nd F and decimal point key combination converts the number on the display to the next angle unit. Press , type 90, then and . $\displaystyle 90^{\circ}$ is $\displaystyle \dfrac{1}{2}\pi$ radians. Again , : 100. grads. And again , : back to 90. degrees.

▶ Watch this step in the video (28:20)