Q. Express z1=−103−10i in polar form.Express your answer in exact terms, using radians, where your angle is between 0 and 2π radians, inclusive.z1=
Calculate Magnitude: To express the complex number z1=−103−10i in polar form, we need to find its magnitude (r) and angle (θ) with respect to the positive x-axis. The magnitude is found using the formula r=a2+b2, where a is the real part and b is the imaginary part of the complex number.Calculation: r=(−103)2+(−10)2=300+100=400=20.
Calculate Angle: Next, we find the angle θ using the formula θ=arctan(ab), where a is the real part and b is the imaginary part of the complex number. Since the complex number is in the third quadrant (both real and imaginary parts are negative), we need to add π to the angle obtained from the arctan function to get the angle in the correct quadrant.Calculation: θ=arctan(−103−10)=arctan(31). The arctan of 31 is 6π, but since the complex number is in the third quadrant, we add π to get θ=6π+π=67π.
Find Polar Form: The polar form of a complex number is given by r(cos(θ)+isin(θ)). Substituting the values of r and θ we found in the previous steps, we get the polar form of z1.Calculation: z1=20(cos(67π)+isin(67π)).
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