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z=-3-6i
Find the angle 
theta (in radians) that 
z makes in the complex plane. Round your answer, if necessary, to the nearest thousandth. Express 
theta between 
-pi and 
pi.

theta=

z=36i z=-3-6 i \newlineFind the angle θ \theta (in radians) that z z makes in the complex plane. Round your answer, if necessary, to the nearest thousandth. Express θ \theta between π -\pi and π \pi .\newlineθ= \theta=

Full solution

Q. z=36i z=-3-6 i \newlineFind the angle θ \theta (in radians) that z z makes in the complex plane. Round your answer, if necessary, to the nearest thousandth. Express θ \theta between π -\pi and π \pi .\newlineθ= \theta=
  1. Identify real and imaginary parts: To find the angle θ\theta that the complex number z=36iz = -3 - 6i makes with the positive x-axis in the complex plane, we need to use the arctangent function, which gives us the angle in radians for a given ratio of the imaginary part to the real part of a complex number. The formula to find the angle is θ=atan2(imaginary part,real part)\theta = \text{atan2}(\text{imaginary part}, \text{real part}).
  2. Use atan22 function: First, identify the real part and the imaginary part of the complex number z=36iz = -3 - 6i. The real part is 3-3 and the imaginary part is 6-6.
  3. Calculate θ\theta: Now, use the atan2\text{atan2} function to find the angle. The atan2\text{atan2} function takes into account the signs of both the real and imaginary parts to determine the correct quadrant for the angle.\newlineθ=atan2(6,3)\theta = \text{atan2}(-6, -3)
  4. Determine the quadrant: Calculate the value of θ\theta using the atan22 function.θ=atan2(6,3)\theta = \text{atan2}(-6, -3)
  5. Find the angle θ\theta: The atan2\text{atan2} function will return a value in radians. Since the real part and the imaginary part are both negative, the angle θ\theta will be in the third quadrant. The atan2\text{atan2} function will automatically give us an angle in the correct range between π-\pi and π\pi.
  6. Find the angle θ\theta: The atan2\text{atan2} function will return a value in radians. Since the real part and the imaginary part are both negative, the angle θ\theta will be in the third quadrant. The atan2\text{atan2} function will automatically give us an angle in the correct range between π-\pi and π\pi.After calculating, we find that the angle θ\theta is approximately 2.034-2.034 radians. This is the angle that zz makes with the positive xx-axis in the complex plane, and it is expressed between π-\pi and π\pi.

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