A. π/6

B. π/4

C. π/3

D. π/2

The ascending order of the moduli of the complex numbers z_{1}=1+i,z_{2}=1+2i,z_{3}=1-i/√2,z_{4}=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,ω^{2} are the cube roots of unity, then (a+bω+cω^{2})/ (c+aω+bω^{2}) is equal to:

If (cos 3α+i sin 3α)(cos 5β+i sin 5β)= cos θ+i sin θ then θ is