Compute the modulus and argument for these complex numbers. Graph them on this plane;
1. 2+2i
Modulus:
Argument
2. 4i
Modulus:
Argument:
For the complex number a + bi,
the modulus is sqrt( a2 + b2 )
and the argument is the tan-1( b/a ) [placed in the correct quadrant]..
2 + 2i: modulus = sqrt( 22 + 22 ) = sqrt( 8 )
argument = tan-1( 2 / 2 ) = tan-1( 1 ) = 45o.
4i = 0 + 4i: modulus = sqrt( 02 + 42 ) = 4
argument = tan-1( 4 / 0 ) = 90o.