A) two waves
B) three waves
C) four waves
D) five waves
Correct Answer: B
Solution :
\[y=4{{\cos }^{2}}(t/2)\sin (10\omega t)\] \[=2[2{{\cos }^{2}}(t/2)\sin (10\omega t)]\] \[=2[(1+\cos t)\sin (10\omega t)]\] \[=2\sin (10\omega t)+2\sin (10\omega t)\cos t\] \[=2\sin (10\omega t)+\sin (10\omega t)+\sin (999t)\]You need to login to perform this action.
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