Which pair of equations can be used to verify the rectangular form, z = a + bi, and the polar form of a complex number are equivalent? A.) a = sin(θ) and b = cos(θ)
B.) a = cos(θ) and b = sin(θ)
C.) a = rsin(θ) and b = rcos(θ)
D.) a = rcos(θ) and b = rsin(θ)