1.8. Express the real part of each of the following signals in the form Ae¯" cos(wt + b). where A, a, w, and are real numbers with A ≥ 0 and

-< ≤ T: (a) x₁(t) = -2 √√2e4 cos(3t+ 2π) jet- (-2+j100 (c) x²(t) = e sin(3t+ π) -1 (b) x₂(t) = (d) x₁(t) =