Q20 of 202 Page 212

If |z| = 6 and arg (z) = , find z.

we have, |z| = 6 and arg (z) =

Let z = r(cosθ + i sinθ)


We know that, |z| = r = 6


And arg (z) = θ =


Thus, z = r(cosθ + i sinθ) =


More from this chapter

All 202 →
18

If z = , find z-1.

 19

Prove that arg (z) + arg = 0

 21

Find the principal argument of (–2i).

 22

Write the principal argument of (1 + i)2.