  We present our analysis of the K2 short-cadence data of two previously known
hot Jupiter exoplanets: WASP-55b and WASP-75b. The high precision of the K2
lightcurves enabled us to search for transit timing and duration variations,
rotational modulation, starspots, phase-curve variations and additional
transiting planets. We identified stellar variability in the WASP-75 lightcurve
which may be an indication of rotational modulation, with an estimated period
of $11.2\pm1.5$ days. We combined this with the spectroscopically measured
$v\sin(i_*)$ to calculate a possible line of sight projected inclination angle
of $i_*=41\pm16^{\circ}$. We also perform a global analysis of K2 and
previously published data to refine the system parameters.
