Q3.

A current signal has the form

(i)

(ii)

1 (t)= Ke-10t cos (50 t-). Amps

Sketch a graph of this voltage signal with labelled axes for

t = -0.04 to 0.04 seconds

State whether this function is an even, odd or unsymmetrical

function.

(iii) State the limiting value of the function as t approaches infinity and

minus infinity.

[6 marks]

For K = 10, red line is exponential term only