# need help with trigonometry question ?

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- 6 months ago
First you need to find r, the distance from the origin. This is easily done via the pythagorean theorem since you have both a real coefficient (a = 3) and an imaginary one (b = -4).

Then you need the angle. This can be found with the inverse tangent function since you have the two non-hypotenuse sides of a triangle. tan(x) = opp/adj = a/b

So x = arctan(a/b)

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