To print higher-resolution math symbols, click the Hi-Res Fonts for Printing button on the jsMath control panel.
No jsMath TeX fonts found -- using image fonts instead.
These may be slow and might not print well.
Use the jsMath control panel to get additional information.
The angle −v is the reflection of the angle v in the x-axis, and under such reflection the x-coordinate does not change, whereas the y-coordinate changes sign. This means that if sinv=a, then sin(−v)=−a.
