Cosine in radians (DRG: DEG → RAD)

The cosine of $\displaystyle \frac{\pi}{4}$ in radians follows. Press once to switch from degrees to radians. Then press , press , press , press , type 4, and press . The parentheses make the entire fraction the angle. Press : 0.707106781.

▶ Watch this step in the video (14:58)