Consider the following. (5 + 51)(3 – 31) (a) Write the trigonometric forms of the complex numbers. (Let 0 s 0 < 21.) (5 + 5i) = 5V2 ( cos " + i sin 4 (3 – 31) = 3v2 [ cos +i sin 4 %3D 4 (b) Perform the indicated operation using the trigonometric forms. (Let 0 s0 < 2n.) 30 (c) Perform the indicated operation using the standard forms, and check your result with that of part (b). 30

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