810 Given the sinusoids v1t = 250 cos t 45 V and v2t = 750 sin

8–10 Given the sinusoids v1ðtÞ = 250 cos ðωt − 45Þ V and v2ðtÞ = 750 sin ð ωtÞ V, use the additive property of phasors to find v3ðtÞ such that v1 + v2 + v3 = 0.