Write an equation for a cosine function with an amplitude of 3, a period of 2, a phase shift of -2, and a vertical displacement of 5.

y=3cos⁡2π(x+2)+5

y=3cos⁡2π(x−5)+2

y=5cos⁡3π(x−2)+2

y=3cos⁡2π(x+2) / 2+5

Last option

Step-by-step explanation:

The general cosine function has the following form  

Where A is the amplitude: half the vertical distance between the highest peak and the lowest peak of the wave.  

is the period: time it takes the wave to complete a cycle.

k is the vertical displacement.

is the shift phase

In this problem :

So  The function is:

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation: