(III.2)

Hence,

(III.3)

Ramp function : See Fig. III.1(b) for the schematic of a ramp function f(t)=at for t>0 where a is a constant

(III.4)

Hence,

(III.5)

Exponential function : for t>0 where a is a constant

(III.6)

Hence,

(III.7)

Sinusoidal function :

(III.8)