atan(-.8391) = -40°
As we want values between 0 and 360, solutions are
-40° + 180°, -40° + 360° or 140°, 320°
Dylan W.
asked • 03/11/21math precalculus
Find the value of θ if 0 ≤ θ < 360 for tanθ = -0.8391
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