Question: If y 1 = 2 0 cos ( wt - 3 0 ) and y 2 = 4 0 cos ( wt + 6 0

If y1=20 cos(wt -30) and y2=40 cos(wt +60), express y = y,+ y as a single sinusoidal function. a) Solve by using trigonometric identities. b) Solve by using the phasor concept.

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