toriss.

Tori here for the last blog before exams. I am extremely worried about this exam because i dont remember anyyyythingg from chapter 8. its gonna be really hard to pass but i hope i wont be the only one in the room taking the exam.

I'm gonna go over polar/rectangular: i wish the entire exam would be this stufff!

here are your formulas:
polar:(r, theta)r =+/-squareroot of x^ 2 + y^2::tan theta=inverse of y/x
rectangular:(x,y)x=rcosthetay=rsintheta
give the polar point for (3,4)
since the second number is not a degree, you know its in rectangular
so to convert to polar, you look at your formulas
r = squareroot of 3^2 +4^2=square root of 25 = +/-5
so r=+/-5theta=tan inverse of 4/3 =53.130degrees
so your point in polar would be (5, 53.130) and (-5, 233.130) because there are two quadrants where tan is positive

To plot, you just take your coordinate plane, go the regular for the x and for the degree, you just imagine your unit circle and go the approximate amount of degrees around. and for the other point, you just mirror it.


blah blah blahh. notes notes noteess and there ya go.