Verified Answer :

\(a=\sqrt6\cdot \cos 315=\sqrt 6 \cdot\dfrac{\sqrt2}{2}=\dfrac{\sqrt{12}}{2}=\dfrac{2\sqrt3}{2}=\sqrt3\\ b=\sqrt6\cdot \sin 315=\sqrt 6 \cdot\left(-\dfrac{\sqrt2}{2}\right)=-\dfrac{\sqrt{12}}{2}=-\dfrac{2\sqrt3}{2}=-\sqrt3\\\\ a+bi=\sqrt3-\sqrt3i\)

Answer:

\(\sqrt{3} -i\sqrt{3}\)

Step-by-step explanation:

The given complex number is,

\(\sqrt{6}(\cos 315^{\circ} + i \sin 315^{\circ})\)

we know that,

\(\sin 315^{\circ}=-\dfrac{1}{\sqrt2}\) and

\(\cos 315^{\circ}=\dfrac{1}{\sqrt2}\)

Putting the values,

\(=\sqrt{6}\left(\dfrac{1}{\sqrt2} -i\dfrac{1}{\sqrt2}\right)\)

\(=\sqrt{2}\sqrt{3}\left(\dfrac{1}{\sqrt2} -i\dfrac{1}{\sqrt2}\right)\)

\(=\sqrt{2}\sqrt{3}\left(\dfrac{1}{\sqrt2}\right) -i\sqrt{2}\sqrt{3}\left(\dfrac{1}{\sqrt2}\right)\)

\(=\sqrt{3} -i\sqrt{3}\)