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

Question

anonymous · Answer

attachment

anonymous · Answer

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

ganeshie8 · Answer

try entering pi+arctan(-3)

anonymous · Answer

nope.  that's not correct either.

ganeshie8 · Answer

enter the numerical value in radians

anonymous · Answer

i tried that.  it doesn't work either.

ganeshie8 · Answer

did u try 1.8925

anonymous · Answer

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

ganeshie8 · Answer

add pi = 3.14 to that

ganeshie8 · Answer

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

anonymous · Answer

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

ganeshie8 · Answer

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

ganeshie8 · Answer

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