How do you find the amplitude and period of $y=0.5cos2pix$ ?

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Answer 1 · 2015-08-12T03:20:51

Amplitude= 0.5
Period=1

Amplitude is the coefficient of $0.5cos(theta)$ . So it is 0.5

Period comes from $omega=(2pi)/T$

$cos(omegax)=cos(2pix)$
Hence, $omega=2pi$

$(2pi)/T=2pi$

Solve for $T$ , you get $T=1$ .

How do you find the amplitude and period of y=0.5cos2pixy=0.5cos2pix?