adult education

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Determine the amplitude of: y=-2sinx

  • Math, not "adult education" -

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    Please type your subject in the School Subject box. Any other words are likely to delay responses from a teacher who knows that subject well.

  • Trigonometry -

    A typical trigonometric function such as

    f(x) = a sin k(x-φ)
    has the following definitions:
    amplitude = |a|, or the absolute value of a
    period = 2π/k
    phase shift = φ

    For example,
    y = 3 sin 2(x-π/4)
    has an amplitude of 3, period of 2π/2=π, and phase shift of π/4 to the right.

    So for y = -2 sin x,
    the amplitude would be |-2| = 2.

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