Precal question on modulus plz HeLP?

7. Compute the modulus and argument of each complex number.
a. 1 + i
b. 4 – 4i
c. 2 + 5i
d. 2[cos (2pi/3) + i sin (2pi/3)]

Question

Precal question on modulus plz HeLP?

7. Compute the modulus and argument of each complex number.
a. 1 + i
b. 4 – 4i
c. 2 + 5i
d. 2[cos (2pi/3) + i sin (2pi/3)]

amistre64 · Answer

can you define modulus and arguement in this context?

anonymous · Answer

im not sure thats how its asked on the paper

amistre64 · Answer

well, in order to determine the solutions; it would help would know what it is that they are actually asking for.

the modulus is the distance the "point" is from the origin
the argument is the angle that the "vector" makes with the postive x axis

amistre64 · Answer

the modulus of:  a+bi is simply sqrt(a^2+b^2)

the arguement of a+bi is:  arctan(b/a)

amistre64 · Answer

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