Question

this doesn't make any sense....i can't figure out what i'm doing wrong.....

Answer 1

theta is simply arctan(y/x).....so why is webwork having issue with this? is it webwork or did i do something?

Answer 2

try entering pi+arctan(-3)

Answer 3

nope. that's not correct either.

Answer 4

enter the numerical value in radians

Answer 5

i tried that. it doesn't work either.

Answer 6

did u try 1.8925

Answer 7

that's right.....how did you get that? even my calculator says arctan (-3)=-1.249.

Answer 8

add pi = 3.14 to that

Answer 9

calculators give you values between pi/2 and pi/2
we need to fix it by adding/subtracting pi based on the quadrant you're in

Answer 10

oh. i misread. thought you wanted to multiply pi to that. do i do that when arctan is negative?

Answer 11

do that when u know that theta is not in (-pi/2, pi/2)