Two Harmonic Waves Are Described By $$y _ { 1 } = ( 6.00 \mathrm {~cm} ) \sin \left( \pi \left( \frac { 2.00 } { \mathrm {~m} } x + \frac { 3.00 } { \mathrm {~s} } t \right) \right)$$

Multiple Choice

Two harmonic waves are described by $$y _ { 1 } = ( 6.00 \mathrm {~cm} ) \sin \left( \pi \left( \frac { 2.00 } { \mathrm {~m} } x + \frac { 3.00 } { \mathrm {~s} } t \right) \right)$$ $$y _ { 2 } = ( 6.00 \mathrm {~cm} ) \sin \left( \pi \left( \frac { 2.00 } { \mathrm {~m} } x - \frac { 3.00 } { \mathrm {~s} } t \right) \right)$$ What is the magnitude of the displacement (in cm) of this wave at x = 3 cm and t = 5 sec?

A) 12.0
B) 3.00
C) 6.00
D) 2.25
E) 0