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Home > PC > Chapter 11 > Lesson 11.2.1 > Problem 11-70

  1. Find the polar form of the complex number given below. Approximate your values to three decimal places. (Remember to figure out the correct quadrant of the complex number when you find the value for θ.) Homework Help ✎

    1. 3 − 4i

    2. −12 − 5i

Graph the point.

Draw a right triangle with the x-axis.

'r' is the length of the hypotenuse of the triangle. Calculate 'r' by using the Pythagorean theorem.

Use trigonometry to find the angle marked α.

Use the measure of angle α to find θ.