A. 0
B. 1
C. 2
D. 4
Express (a+ib/ a-ib)+(a-ib/ a+ib) in the form of a+ib
If (a+ib)2= x+iy then x2+y2=
For all values of a and b(a + 2b)x + (a- b)y + (a + 5b) = 0 passes through the point:
If the direction ratio of two lines are given by 3lm-4ln+mn =0 and l+2m+3n=0,then the angle between the lines, is
The ascending order of the moduli of the complex numbers z1=1+i,z2=1+2i,z3=1-i/√2,z4=3+4i is
The period of the function tan(3x+5) is:
I: The modulus of √3+i/(1+i)(1+√3i) is 1/√2
II: The least positive value of n for which (1-i/1+i)n=1 is 2
If 1,ω,ω2 are the cube roots of unity, then (a+bω+cω2)/ (c+aω+bω2) is equal to:
If (cos 3α+i sin 3α)(cos 5β+i sin 5β)= cos θ+i sin θ then θ is
If x+iy= cis α cis β then the value of x2+y2 is