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Which of the following is incorrect when function \( x=A \sin ^{2} \omega t+B \cos ^{2} \omega t+C \sin \omega t \cos \omega t \) represents SHM?
(a) if \( A=0, B=0 \), it will be in SHM
(b) if \( A=-B, C=2 B \), amplitude \( =|B \sqrt{2}| \)
(c) if \( A=B, C=0 \), amplitude \( =|B| \)
(d) if \( A=B, C=2 B \), it will be in SHM
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