Question

Need help..!!

Answer 1

@Mertsj ?

Answer 2

a (x-2pi)

Answer 3

d. (x-2pi)

Answer 4

kool thanks so a & d are False..

Answer 5

yes

Answer 6

got it.. :)

Answer 7

AoPS?
Both are false. I think that the cosine would be the opposite. For example, cosin(x-3pi)=-cosin(x). My reasoning is that both ultimately end in a change of 180 degrees, which opposites the x coordinate (the cosine corresponds with the x). I agree that both should be (x-2pi). This would be an ultimate change of 0 degrees.

Answer 8

thanks..!!

Answer 9

yw