7/5
-7/5
-7/15
7/15
Express in the form b or bi, where b is a real number.
i
-i
2i
- 2i
Find the modulus of sin α - i cos α
sin2α
Cos2α
1
2
Write i19 in the form x+iy
1 + i
1 - i
O + i
O - i
Write 1 + i2 + i4 + i6 in the form x+ iy
0 + i
0+0i
1 + o.i
Z2
Z
Find the conjugate of √-1 -3
√-1 + 3
√-1 -3
i - 3
-i -3
If 2x + (3x + y)i = 4 + 10i, then the value of x and y are
2, 3
2, 4
4, 2
3, 2
The principal value of argument of 1 + i is
π/2
π/3
π/4
None of these
Determine x and y for which 2x + 3yi = 2+ 9i
x = 1, y = 3
x = 3, y = 1
x = 2, y = 1
x = 1, y = 2
