$\\sqrt{2}(\\cos \\frac{\\pi}{4} + i \\sin \\frac{\\pi}{4})$

$\\sqrt{2}(\\cos \\frac{\\pi}{2} + i \\sin \\frac{\\pi}{2})$

$2(\\cos \\frac{\\pi}{4} + i \\sin \\frac{\\pi}{4})$

$\\sqrt{2}(\\cos \\frac{\\pi}{3} + i \\sin \\frac{\\pi}{3})$