Dom's blog

Chapter 13
Arithmetic
ex. 1, 5, 9, 13, 17, 21.
Geometric - kin of the same thing but with multiplying.
ex. 5, 25, 125, 625.
Chapter 11
y = xsiny
x= xcosy
So uh, example.
ex. Rectangular coordinates of (2, 45)
x = 2cos45
y = 2sin45
y = sin90 and x = cos90

= 2(sqrt3)/2 and 0