89 If the derivative property of phasors is multiplication of the phasor by j, the integral property

8–9 If the derivative property of phasors is multiplication of the phasor by jω, the integral property of phasors is division of the phasor by jω. Use phasors and these properties to find the sinusoids in each of the following:

(a) v2ðtÞ = 1 100 dv1ðtÞ
dt + 20 v1ðtÞ and v1ðtÞ = 10 cos 100t + 90o ð ÞV

(b) i2ðtÞ = 10 Z i1ðtÞdt−3i1ðtÞ and i1ðtÞ = −4 cosð5tÞA