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If y = -6cosx, what is the amplitude?
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If y = -6cosx, what is the amplitude?

User ONYX
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\displaystyle\bf\\y=-6cos\,x\\\\\textbf{is equivalent to:}\\\\y=6cos(x+\pi)\\\\\textbf{where 6 is the maximum value or amplitude}\\\\\implies~~~\boxed{\bf~amplitude=6}

User Ayjay
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