Find the polar form r(cosθ+isinθ)r(cos \theta + i sin \theta)r(cosθ+isinθ) of the complex number z=−1+iz = -1 + iz=−1+i.
2(cos3π4+isin3π4)\sqrt{2}(cos \frac{3\pi}{4} + i sin \frac{3\pi}{4})2(cos43π+isin43π)
2(cosπ4+isinπ4)\sqrt{2}(cos \frac{\pi}{4} + i sin \frac{\pi}{4})2(cos4π+isin4π)
2(cos3π4+isin3π4)2(cos \frac{3\pi}{4} + i sin \frac{3\pi}{4})2(cos43π+isin43π)
2(cos7π4+isin7π4)\sqrt{2}(cos \frac{7\pi}{4} + i sin \frac{7\pi}{4})2(cos47π+isin47π)