Question

Find the rectangular coordinates of each point.

1.(2,3pi/4)

2. (-4,7pi/6)

3.(2/3,-2pi/3)

Answer 1

(rcos(ang),rsin(ang))

Answer 2

@SantanaG Can you follow the instruction?

Answer 3

I dont know how

Answer 4

1. ( a, bi ) = ( -√2, √2)
Since a = 2 cos ( 3π/4)
b = 2 sin ( 3π/4)

Answer 5

so i just do that for the rest also?

Answer 6

= -√2 + √2 i

Answer 7

Yes, just apply @A.Avinash_Goutham's instruction :)

Answer 8

ok thanks :)

Answer 9

@Chlorophyll why is it (a,bi) instead of (a,b)?

Answer 10

Because you're working with COMPLEX number!
The equation is the relationship between polar and rectangular form of complex number :)

Answer 11

oh ok thank you :D