complex numbers - test

N.	question	answer
1	What is the modulus of ?	2 4 3 3i
2	What is the argument of	π/2 π/3 π/4 π/6
3	What is the trigonometric form of ?
4	What is the reciprocal of
5	Given and , their ratio z1/z2 is	1 2+i
6	Given , z16 is equal to	64 -64 6 4
7	Given and , what of the following statements is true?	z1>z2 z1=z2 z1<z2 none of them
8	What of the following numbers isn't a fourth root of 1?	1/4 1 -1 i
9	What is the modulus of e2i?	2 4 1
10	Given and , their product is	2ei 4e2πi 8e4πi 1