Polar form of 3 + 4i is:
(a) \(\cos(\tan^{-1}\frac{4}{3}) + i\ \sin(\tan^{-1}\ \frac{4}{3})\)
(b) \(5\ [\cos^{-1}(\frac{4}{3}) + i\ \sin^{-1}\ (\frac{4}{3})]\)
(c) \(\cos\ (\tan^{-1}\frac{4}{3}) - i\ \sin(\tan^{-1}\ \frac{4}{3})\)
(d) None of the above
