Solve the Initial Value Problem $$\frac { \mathrm { ds } } { \mathrm { dt } } = \cos \mathrm { t } - \sin t , s \left( \frac { \pi } { 2 } \right) = 4$$

Multiple Choice

Solve the initial value problem.
- $$\frac { \mathrm { ds } } { \mathrm { dt } } = \cos \mathrm { t } - \sin t , s \left( \frac { \pi } { 2 } \right) = 4$$

A) $s = 2 \sin t + 2$
B) $s = \sin t - \cos t + 3$
C) $s = \sin t + \cos t + 5$
D) $s = \sin t + \cos t + 3$