Posted by Alex on .
The point (7,2) determines a position angle "t". Find the exact value of sin(t).

PreCal: Trig 
drwls,
Relative to the origin and counterclockwise from the +x axis, the "position angle" theta for polar coordinates would be
arctan 2/7 = 15.9454 degrees
The sine of that angle is 0.2747 =
2/sqrt(53)