1. Exact Angle - Multiples and x-y Plane
In Degrees , 60 , 45 , 30
90 - Multiples 60 - Multiples
o
o o
120
o o
180
o o
o
45 - Multiples 30 - Multiples
o
135o
o
150o
o
210o
o 315o

2. Exact Coordinates for P( )
Recall, P( ) = (cos , sin )
P(180

3. x=y
1
Use a + b = c = y
r
x
(- , ) ( , )
(- ,- ) ( ,- )
Conclusion:
P( ) = (+
- ,+
- )
tan( ) = +1
-

4. Conclusion:
P( ) = (+
- , +
- )
+
-

5. 1
1
coordinates of 30
Conclusion:
P( ) = (+
- ,+
- )