18
QuizMultiple Choice

Complex Numbers — Test

Question 18 • Math 4

Let z is equal to 38 times open paren cosine of open paren pi over 16 close paren plus i sine open paren pi over 16 close paren close paren and w is equal to 2 times open paren cosine of open paren pi over 16 close paren plus i sine open paren pi over 16 close paren close paren What is the product of z w ?

Answer
A
76 times open paren cosine of open paren pi over 16 close paren plus i sine open paren pi over 16 close paren close paren
B
76 times open paren cosine of open paren 3 pi over 8 close paren plus i sine open paren 3 pi over 8 close paren close paren
C
40 times open paren cosine of open paren pi over 16 close paren plus i sine open paren pi over 16 close paren close paren
D
40 times open paren cosine of open paren 3 pi over 16 close paren plus i sine open paren 3 pi over 16 close paren close paren
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