Question

Graph the function y=2cos(x+3pi)+1

Answer 1

no luck?

Answer 2

here might be an easier one that i need also,two coterminal angles, a positive and a negative for theta =3pi/4

Answer 3

y=2cos(x+3pi)+1
y=2 (cos(x)+cos(3pi)) +1
y=2 cos(x)+2cos(3pi) +1
y=2 cos(x)+2(-1) +1
y=2 cos(x)+-2 +1
y = 1-2cos(x) <- simplified equation

Answer 4

so to graph it, just start plugging in some coordinates for x and see what you get..
so plug in:
x=0, thus y=-1
x=pi, thus y=3
x=2pi, thus y=-1
ya?

Answer 5

okay

Answer 6

since you are working with a trig funtion (cos) that is why i say use x as pi, and not a number like 1 or 2,
fyi

cheers!

Answer 7

thank you

Answer 8

you bet!