A) 2
B) 3
C) 1
D) none
Correct Answer: B
Solution :
Given \[y=4{{\cos }^{2}}\left( \frac{t}{2} \right)\,\sin (1000t)\] \[=2(1+\cos t)\,\sin (1000t)\] \[(\therefore \,\,1+\cos \theta f\,=2{{\cos }^{2}}\,\frac{\theta }{2})\] \[=2\,\sin 1000\,t+2\,\cos t\sin \,1000\,t\] \[=2\,\sin 1000t+\sin (1001)\,t+\sin (999)t\] Therefore, it consists of 3 SHM?sYou need to login to perform this action.
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