A) Two
B) Three
C) Four
D) Five
Correct Answer: B
Solution :
\[y=4{{\cos }^{2}}\left( \frac{t}{2} \right)\sin 1000\ t\] \[\Rightarrow y=2(1+\cos t)\sin 1000\ t\] \[\Rightarrow y=2\sin 1000\ t+2\cos t\ \sin 1000t\] \[\Rightarrow y=2\sin 1000\ t+\sin 999\ t+\sin 1001\ t\] It is a sum of three S.H.M.You need to login to perform this action.
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