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OpenStudy (anonymous):
Convert 3cis 180° to rectangular form.
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OpenStudy (anonymous):
do you know \(\cos(180^\circ)\) ?
OpenStudy (anonymous):
-1
OpenStudy (anonymous):
ok how about \(\sin(180^\circ)\)?
OpenStudy (anonymous):
o
OpenStudy (anonymous):
k then you are pretty much done \[3(\cos(180)+i\sin(180))=?\]
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OpenStudy (anonymous):
-3i
OpenStudy (anonymous):
i think it is -3
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