Question 87261
<pre>Determine the rectangular form of the following complex number:
z = {{{7(cos(3pi/2) + i sin(3pi/2))}}}


Just work it out substituting {{{cos(3pi/2)}}} = 0 and {{{sin(3pi/2)}}} = -1

z = 7(0 + i(-1))

z = 7(-i)

z = -7i

Edwin</pre>