Question

How do I solve this sine/cosine graph? Like which equation fits the graph best?

Answer 1

@perl

Answer 2

@triciaal

Answer 3

@surjithayer

Answer 4

@perl

Answer 5

still need help?

Answer 6

The easiest way is testing. Something like: if you think it is D) \(y =-2cos \dfrac{1}{4}(x-4\pi) +2\)
Then test if x =6pi, y = -2 cos pi/2 +2 = 2, then look at the graph, right the point x =6pi, if y = 2, then it is ok. To make sure it is, test another point,

Answer 7

wait what? I still dont get it ... @OOOPS

Answer 8

@OOOPS Do you mind further explaining what you mean by checking points please?