Select the functions that have identical graphs.
1)y = cos x
2)y = -sin(x – pi)
3)y= cos x - pi/2
a. 1,2, and 3
b. 1 and 3
C. 2 and 3
D. 1 and 2

"curse these trig-loving pirates! " devora mutters as she looks at the map. then, after thinking for a moment, she walks back to the entrance of the secret cave, measuring 48 meters along the way. after performing a calculation, devora walks back to the empty treasure, faces the entrance, and turns a certain number of degrees to her left before walking 89 meters to the treasure. supposing that the angle at the cave entrance is acute and that devora's calculations were correct, how many degrees did she turn?

Gables properties corp. is leasing office building with an area of 49b^2+70b+25. what is the shape of the building? a) rectangle b) square

As a salesperson you get $23/ day and $3.60/each sale you make. if you want to make at least $84. in one day, how many sales would need to make? a 15b 16c 17d 18