Complex number problem

[Jared123]

Are my working out and answer correct?

 

[Harry_the_cat]

Take it one step further. What is cos(3pi/2) and sin(3pi/2).

 

[Jared123]

Take it one step further. What is cos(3pi/2) and sin(3pi/2).

then the answer would be z=0+i z=i

 

[pka]

\(\sin\left(\dfrac{3\pi}{2}\right)=-1\)

 

[Jared123]

\(\sin\left(\dfrac{3\pi}{2}\right)=-1\)

Thank you for the correction