Question

WILL FAN AND MEDEL PLEASE HELP
Select the functions that have identical graphs.
1) y=sin(3x+pi/6)
2) y=cos(3x-pi/6)
3) y=cos(3x-pi/3)

Answer 1

expand these functions and you will come to know

Answer 2

for \[\sin(A+B)=sinA*cosB+sinB*cosA\]

Answer 3

\[\cos(A-B)=cosA*cosB+sinA*sinB\]
\[\cos(A+B)=cosA*cosB-sinA*sinB\]

Answer 4

use these 3

Answer 5

sorry i dont stay online because i had a class to go to but thank you for helping