Two plane waves of the same frequency and with vibrations in the z-direction are given by: write the resultant waveform expressing their superposition at the point x=5 , cm and y=2 , cm.
a) A sin(2pi ft) + B cos(2pi ft)
b) A cos(2pi ft) + B sin(2pi ft)
c) A sin(4pi ft) + B cos(4pi ft)
d) A cos(4pi ft) + B sin(4pi ft)