Derive the expression x (t) = Acos(wt − p) from x(t) = A₁cos ot+ A₂sin ot
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Derive the expression x (t) = Acos(ωt − ϕ) from x (t) = (c1 + c2)cos ωt + i(c1 − c2)sin ωt x (t) = A1cos ωt + A2sin ωt
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