$7\mathrm{.}5$ Waveforms u$1($t$)$ and u$2($t$)$ are given by:

u$1($t$)=4$sin$(6$p $104$t $+30)$ V$,$

$$

Answer$($s$)$ available in Appendix G$.$

u$2($t$)=2$cos$(6$p $104$t $30)$ V$.$

Does u$2($t$)$ lead or lag u$1($t$),$ and by what phase angle?