Question

Find the direction angle of v for the following vector: v=-7i-4j
(Round to one nearest decimal place as needed.)

Answer 1

Well it looks like in the 'x' direction (represented by 'i') would be -7...and in the 'y' direction (represented by 'j') would be -4

So

\[\large \tan^{-1}(\frac{y}{x})\]
\[\large \theta = \tan^{-1}(\frac{-4}{-7})\]

Answer 2

I got -29.7448813. What do I do next? That's not the right answer.

Answer 3

why did you get a negative answer? we have a negative / negative so it would be positive

Answer 4

Oops I meant positive. But I figured it out. Thanks!

Answer 5

No problem :)