How do you write the trigonometric form of $4$ ?

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Answer 1 · 2017-01-15T00:16:50

The trigonometric form of a complex number is

$z=x+y*i=r*(costheta+isintheta)$

where

$r=sqrt(x^2+y^2)$

and

$theta=tan^-1(y/x)$

For $4$ we have that

$z=4=4+0*i$ hence $x=4$ , $y=0$

therefore $r=4$ and $theta=0$

Hence in trigonometric form

$z=4*(cos0+isin0)$

How do you write the trigonometric form of 44?