Find the direction angle of v for the following vector.
v = -7i - 9j
Ok, since we can write this as (-7,-9) and this is a triangle we can use
tan a = -9/-7
tan a = 9/7
Ok I need to solve. How do I do that. What I keep coming up with is wrong. Do I just user the \( tan^{-1}(9/7) \)

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I need it in degrees

\( tan^{-1}(9/7) \) is suppose to be \( \huge tan^{-1} (\frac{9}{7}) \)

and once I find that subtract 360?

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