Polar → rectangular, θ = −110°

A negative angle is measured clockwise. Take $\displaystyle r = 3.5$ and $\displaystyle \theta = -110^{\circ}$. Press and for Rec, type 3.5, press and , then the and 110. Press and . $\displaystyle x$ is X=−1.197070502, and $\displaystyle y$ is Y=−3.288924173. This point also lies in the third quadrant. Always check the signs against a quick drawing. Then return to natural display: press , , , and again.

▶ Watch this step in the video (34:33)