A) \[\sqrt{A_{0}^{2}+{{(A+B)}^{2}}}\]
B) A+B
C) \[{{A}_{0}}=\sqrt{{{A}^{2}}+{{B}^{2}}}\]
D) \[\sqrt{{{A}^{2}}+{{B}^{2}}}\]
Correct Answer: D
Solution :
\[y={{A}_{0}}+A\text{ }sin\omega t+B\text{ }cos\omega t\] Amplitude of \[A\text{ }sin\omega t+B\text{ }cos\omega t=\sqrt{{{A}^{2}}+{{B}^{2}}}\]
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