Express the answer in degrees please.

390°

Step-by-step explanation:

The polar form of a complex number z=a+bi is z=r(cosθ+isinθ) .

So, we need to first find the absolute value of r .

r=|z|

Given:  z  =  a + bi  from the question √3+i

 a =3 b=1

     r  = √a² + b²  = √(√3)² + 1² = √3 + 1= √4 = 2

 θ =2π + tan⁻¹(b/ a )

θ =2π + tan⁻¹(1/√3 )  

           tan⁻¹(1/√3 ) = π /6 or 30 °

θ  = 2π + π/6 = 12π+π/6 = 13π/6 = 6.8 radians

converting it to degrees it 6.8 x 180/π = 389.611≈390°

correct answer:

b.(19,-2)