How do you multiply $1.41(\cos 315^\circ + i \sin 315^\circ)$ ?

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Answer 1 · 2014-10-25T06:06:31

I assume that $1.41$ is a decimal approximation of $sqrt{2}$ here.

$sqrt{2}(cos315^circ+i sin315^circ)=sqrt{2}(1/sqrt{2}-1/sqrt{2}i)=1-i$

I hope that this was helpful.

How do you multiply 1.41(\cos 315^\circ + i \sin 315^\circ)1.41(\cos 315^\circ + i \sin 315^\circ)?