P-2.19 Sinusoidal equations can be solved as algebraic equations if the sinusoids are converted to phasors. For example, given the equation 9 cos(2t +) = 3A cos(2(t – 1) +4) +4 cos(2t) solve for A and o. Here are the steps: (a) Determine the phasor representation for each term in the above equation. (b) Let z = Aelº, and rewrite the phasor equation in part (a) as 9e10.5 (3e-i²)z +4 (c) Use algebra to solve for z, which will be complex. (d) Finally, express the answer z in polar form in order to determine the values for A and o.

P-2.19 Sinusoidal equations can be solved as algebraic equations if the sinusoids are converted to phasors. For example, given the equation 9 cos(2t +) = 3A cos(2(t – 1) +4) +4 cos(2t) solve for A and o. Here are the steps: (a) Determine the phasor representation for each term in the above equation. (b) Let z = Aelº, and rewrite the phasor equation in part (a) as 9e10.5 (3e-i²)z +4 (c) Use algebra to solve for z, which will be complex. (d) Finally, express the answer z in polar form in order to determine the values for A and o.