<p>As compared to the graph of y = cosx, which of the following has the same period and three times the amplitude?</p>
<p>y=cos3x
y=cos(1/2)(x+3)
y=3cosx
y=1+3cosx
y=3+cosx</p>
<p>y= 3cosx</p>
<p>y=AcosB+D</p>
<p>A= Amplitude
B= period
D= y- intercept</p>
<p>PR book says anwser is y=1+3cosx =/</p>
<p>y= 1+3cosx would be the same as y= 3cosx+1</p>
<p>To me, it seems like both answers are right, considering one is a translated version of the other.</p>
<p>Yanksman25, more accurately the period is 2pi/B for sin/cos/csc/sec sinusoids and pi/B for tan/cot sinusoids. :)</p>
<p>y = cos(2x)
Period = 2pi/2 = pi</p>