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13 September, 02:03

What is the frequency of the function y = cos5x?

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  1. 13 September, 06:00
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    The given formula is a sinusoidal equation. Sinusoidal equations are trigonometric functions involving sine and cosine functions. Graphically, they look like wave patterns having amplitudes and periods. The general form of a sinusoidal equation is

    y = A cos (Bx + C) + D

    where

    A = amplitude

    B = frequency

    C = shift on starting angle

    D = shift of wave on the y-axis

    Thus, can pattern out that A=1, B=5, C=0 and D=0 in the given equation. The SI unit of frequency is Hertz (Hz) or 1/second. Hence, the frequency of the function is 5 Hz.
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