The complex number when represented in the Argand diagram is
In the second quadrant
In the first quadrant
On the y-axis
On the x- axis
If Z = r (cos θ + isin θ), then the value is
Cos2 θ
2 Cos2 θ
2 Cos θ
2 sinθ
If i = √-1 and n is a positive integer, then in +in+1 + in+2 + in+3 is equal to
1
i
in
0
If xr = cos (π/2r) + i sin (π/2r), then x1.x2....∞ is
-3
-2
-1
The modulus and amplitude of are
√2 and π/6
1 and 0
1 and π/3
1 and π/4
The value of is equal to.
-i
The complex numbers sinx + i cos2x and cosx - i sin2x are conjugate to each other for
x = nπ
x = (n + 1/2)π
x = 0
No value of x
will be real, if θ is:
2nπ
nπ + π/2
nπ
None of these
If z is a complex number such that( z-1)/(z+1) is purely imaginary, then,
|z| = 0
|z| = 1
|z| > 1
|z| < 1
If z is a complex number, then is equal to
