If z(2−2√3i)2=i(√3+i)4, then arg(z)=
If the product of the roots of equation 2x2 + ax + 4 sin a = 0 is 1, then roots will be imaginary if :
cos−1(cos7π6) is equal to a) 7π6 b) 5π6 c) π3 d) π6
The polar form of −√32−i2 (where i = √−1) is