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In the equation y=4cos 6x, what does 6 represent?

In general for the equation y-acosbx, what does b represent?

  • Trig -

    The six in the first equation represents a reciprocal wavelength, also known as the wave number.

    y - a cosbx is NOT an equation

    An equation would be y = a cos bx
    b would be the wave number.

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