Question: 13 Marks) ( a) Evaluate Z ? 0 e ??t cos at ? e ??t cos bt t dt, ? > 0, ? > 0.

13 Marks) (

a) Evaluate Z ? 0 e ??t cos at ? e ??t cos bt t dt, ? > 0, ? > 0. Justify carefully your conclusion.

(b) Evaluate R ? 0 te?4t cos 3tdt.

13 Marks) ( a) Evaluate Z ? 0 e ??t cos at ? e
7. (13 Marks) (a) Evaluate e-at cos at - e-Bt cos bt dt, a > 0, B > 0. o t Justify carefully your conclusion. (b) Evaluate Jo te-At cos 3tdt

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