Q. Find the argument of the complex number 3−3i in the interval 0≤θ<2π.Express your answer in terms of π.Answer:
Calculate arctan value: To find the argument of a complex number in the form a+bi, where a is the real part and b is the imaginary part, we use the formula θ=arctan(ab). Here, a=3 and b=−3.
Use special triangles: Calculate the arctan of b/a: θ=arctan(−3/3).
Adjust for quadrant: Using the special triangles, we know that arctan(−3/3) corresponds to −π/6 because tan(π/6)=3/3, and since b is negative, the angle is in the fourth quadrant.
Find positive angle: However, the argument of a complex number is typically given as a positive angle between 0 and 2π. To find this, we add 2π to −π/6 to get the positive angle.
Calculate final argument: Adding 2π to −π/6 gives us the final argument: θ=2π−π/6=(12π/6)−(1π/6)=11π/6.
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