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Q3. Express the following complex numbers in the form x + iy in (a) e-in/4 (b) 6ei27/3 (c) e4+in2 (d) e-i2n + 214n Q4. Derive

Q3. Express the following complex numbers in the form x + iy in (a) e-in/4 (b) 6ei27/3 (c) e4+in2 (d) e-i2n + 214n Q4. Derive the formula of de Moivre, cos no + i sin n0 = (cos 0 + i sino)"

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