A modulating signal given by 3 3 x( ) 5sin(4 10 10 cos2 10 )V tt t is modulated with phase…

A modulating signal given by 3 3 x( ) 5sin(4 10 10 cos2 10 )V tt t ? ?? ? ? ?? is modulated with phase deviation constant k p ? 5rad/V . If the carrier frequency is 20 kHz then instantaneous frequency (in kHz) at t = 0.5 m sec. is