Chapter 7 - Trigonometry and Periodic Functions - 7.2 The Sine and Cosine Functions - Exercises and Problems for Section 7.2 - Exercises and Problems - Page 277: 15

$(3.687,-0.919)$

It is known that the coordinate on the $x$-$y$ plane for an angle $\theta$ from the horizontal and a radius $r$ is $(rcos\theta,rsin\theta)$. Using $r=3.8$ and $\theta=1426^\circ$ gives a point $$(3.8cos(1426^\circ),3.8sin(1426^\circ))=(3.687,-0.919)$$ (Use a calculator to estimate those values. Make sure the calculator is on degree mode.)