Question

How do you convert `(4, -pi/2)` to rectangular form?

Answer 1

`=>x=0and y= -4`

Explanation:

If Cartesian or rectangular coordinate of a point be (x,y)
and its polar polar coordinate be `(r,theta)`

then `x=rcostheta and y= rsintheta`
here `r=4 and theta =-pi/2`
`:.`
`x=4cos(-pi/2) and y= 4sin(-pi/2)`
`=>x=4*0and y= -4*1`
`=>x=0and y= -4`