Please answer drawing

Question

anonymous · Answer

|dw:1329313311587:dw| plot the point -63.4
I git -63.4 after finding tan inverse of (-2)

anonymous · Answer

This... makes no sense to me. Am I being obtuse, or...?

anonymous · Answer

-63.4degrees sorry

anonymous · Answer

Oh, ok.
|dw:1329313618900:dw|
Angle n is -63.4 degrees, a is 2, and b is 1. Do you understand why?

anonymous · Answer

No boss

anonymous · Answer

arctan(a/b)=n-->tan(n)=a/b; does this make it any clearer?

anonymous · Answer

Ok i think um near getting it.But tan=opposite/adjacent.Thefore n=tan inverse of 2/1=63.4.i guess its a negative because we are reading the angle anticlockwice.

anonymous · Answer

Yup, or think of the -2 as a j-hat vector, so that its length-magnitude is 2, despite being written as -2.

anonymous · Answer

wats a j-hat vector?

anonymous · Answer

It's the y-component of a Euclidian vector. Don't worry about it if you haven't heard of it before.

anonymous · Answer

Just think of it as -2 because it's extending in the negative direction.

anonymous · Answer

ok :) and also boss i thought that the region where you plot the -63.4 degree angle is supposed to b where positive tan angles are to be plot|dw:1329314464862:dw| how come we plotted it there ?