#2**+5 **

$$\\y=(5/3)cos(4x-pi)+4\\\\

y=(5/3)cos[4(x-\frac{pi}{4})]+4$$

Phase shift is pi/4 to the **right**

This old post goes into more detail

http://web2.0calc.com/questions/graphing-trig-functions_1#rr2

Melody
Mar 4, 2015

#1**+5 **

We can write

y=(5/3)cos[4(x-pi/4)]+4

This is the cosine graph with an amplitude of (5/3) shifted up 4 units

There are 4 periods in 2pi

The phase shift is pi/4 units to the right........

CPhill
Mar 4, 2015

#2**+5 **

Best Answer

$$\\y=(5/3)cos(4x-pi)+4\\\\

y=(5/3)cos[4(x-\frac{pi}{4})]+4$$

Phase shift is pi/4 to the **right**

This old post goes into more detail

http://web2.0calc.com/questions/graphing-trig-functions_1#rr2

Melody
Mar 4, 2015