Ch.11-1

The Chapter that i understood the most so far is Chapter 11 lesson 1. In Ch.11-1, we learned how to plot, give polar coordinates and convert to rectangular. I feel most comfortable converting to rectangular versus the others.

The Formula for converting to rectangular is x=rcos(theta) and y=rsin(theta).
To first convert to rectangular, you must plug in the numbers into the formula. You then solve for cos(ex:2COS90)after you solve cos( already knowing your trig chart) you multiply the number times the answer you get from the second step and you have half of the complete answer. you repeat the exact same steps for solving sin and you will have your complete answer.

EX: Convert(2,30 degrees) to rectangular
1. x=2cos30
2.cos30=square root of 3/2
3. 2 times square root of 3/2= square root of 3
4.(square root of 3,?)
SIN
1.y=2sin30
2.sin30=1/2
3.2 times 1/2=1

Answer:( square root of 3,1)