4.4Complex Number

In openFOrmula section 4.4Complex Number
A complex number (sometimes also called an imaginary number) is a pair
of real numbers including a real part and an imaginary part. In
mathematics, complex numbers are often written as x + iy, where x (the
real part) and y (the imaginary part) are real numbers and i is
. A complex number can also be written as reiθ = rcos(θ) + irsin(θ),
where r is the modulus of the complex number (a real number) and θ is
the argument or phase (a real number representing an angle in
radians).

The representation is: re^(iθ) = rcos(θ) + irsin(θ)
Please correct this.