• 2021 April(Z04) Math Question 58

    Trigonometry

    - Graphing Trig Functions

    Amplitude, Period, Phase Shift and Frequency, Graphs of Sine, Cosine and Tangent
    Choice K
    y=A  cos(B(x+C))+Dy = A \; cos(B(x + C)) + D
    Amplitude=3=>A=3Amplitude = 3=> A=3
    Period=π={2π}{B}=>B=2Period=\pi=\frac\{2\pi\}\{B\} => B=2
    No  shifts=>C=0,  D=0No \; shifts => C=0,\; D=0
    ∴y=3  cos(2(x+0))+0=3  cos(2x)\therefore y = 3 \; cos(2(x + 0)) + 0= 3 \; cos(2x)

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