The instanteneous displacement of x of a particle executing simple harmonic motion is given by x=a1sinωt+a2cos(ωt+π/6). The amplitude A of oscillation is given by
A
√a21+a22+2a1a2cosπ6
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B
√a21+a22+2a1a2cosπ3
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C
√a21+a22−2a1a2cosπ6
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D
√a21+a22−2a1a2cosπ3
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