Two Harmonic Waves Are Described By $$y _ { 1 } = ( 5 \mathrm {~m} ) \sin \left( \frac { 6 } { \mathrm {~m} } x - \frac { 900 } { \mathrm {~s} } t \right)$$

Multiple Choice

Two harmonic waves are described by $$y _ { 1 } = ( 5 \mathrm {~m} ) \sin \left( \frac { 6 } { \mathrm {~m} } x - \frac { 900 } { \mathrm {~s} } t \right)$$ $$y _ { 2 } = ( 5 \mathrm {~m} ) \sin \left( \frac { 6 } { m } x - \frac { 900 } { \mathrm {~s} } t - 2 \right)$$ What is the wavelength of the resultant wave?

A) 3 m
B) 2 m
C) 1 m
D) 4 m
E) 6 m