Question

Which of the following are equivalent to the function y = 4cos x - 2?
a. y= 4sin(x-pi/2)-2
b. y=4sin(x+pi/2) - 2
c. y=4cos(-x)-2
d. y=-4cos x +2.
there could be multiple answers too.

Answer 1

D because cos(-x)=cosx
therefore
y=4cosx-2

Answer 2

so just d ?

Answer 3

nope, its b

Answer 4

both or just b
?

Answer 5

both

Answer 6

i dont really know ,-,

Answer 7

just try D

Answer 8

ahhh. the struggle. okay thanks guys. idk what to do thoughhhh.

Answer 9

http://openstudy.com/study#/updates/4e3a368a0b8bf47d06600b0d

Answer 10

i think it's meant to choose 2 because it has boxes to check off .

Answer 11

oh. i guess d is just the answer. thanks !

Answer 12

lol i guess so ( ͡° ͜ʖ ͡°)

Answer 13

lol nvm. it was wrong xD

Answer 14

it was c & b @Chris911 @Squirrels

Answer 15

i said b soo lol

Answer 16

i think you should give me the medal huh ( ͡° ͜ʖ ͡°)

Answer 17

lol sorry