Please help explain what I did wrong
Express the complex number in trigonometric form. -2i

Please help explain what I did wrong
Express the complex number in trigonometric form. -2i

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I got 2(cos 90° + i sin 90°)
but that was wrong and I don't understand why.

@satellite73

ok cos(90 deg)=0
and sin(90 deg)=1
so you have
2(0+i*1)
2(i*1)
2(i)
2i

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