Complex Numbers

[frank chasm]

Can someone pls help me with this question

[fast marten]

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[kind nymph]

here's how i would do it

for z1z2

for z1/z2, u would have an imaginary term in the denominator; i sinθ2

so u would use the same trick as in that other question, and "realise" the denominator as if ur rationalising a root

[dense lotus]

Why not use the exponential form? Much faster that way.

[kind nymph]

I knew someone would say this

If they’re doing questions like this, it’s more than likely that haven’t done de moivres or exponential form yet