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Write the equation of the cosine function with an amplitude of 1, a period of 3pi/7, a phase shift of -pi/5, and a vertical shift of 2 units down.

  • Trig/Math -

    The only actual calculation you have to do deals witht the period.
    period = 2π/k
    3π/7 = 2π/k
    k =

    I am also not clear about your information re phase shift,
    I will assume that by " a phase shift of -π/5" you mean a shift of π/5 to the left.
    If you meant the opposite, just change the sign for the phase shift in my answer.

    y = cos(14/3)(Ø + π/5) - 2

  • Trig/Math -

    i didn't mean to put a negative sign

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