One other very important point. If you are using angles in degrees, make sure your calculator (or your lookup table) is in degrees. If you are using radians, then your calculator needs to be in ...

In addition to these trigonometric functions, Excel also provides functions for converting angles between radians and degrees. Launch Excel and start a new spreadsheet. Enter labels for the data ...

First, let's reduce the angle to something smaller. The sine function is periodic with period 360° (the calculus teacher in me is struggling with using degrees instead of radians). That means ...

We have already found the first solution which is the acute angle from the 1st quadrant, so to find the second solution, we need to use the rule in the 2nd quadrant. From the graph of the function ...