Question

What trigonometric function represents the graph?

f(x) = 4 sin(x − pi over 2)

f(x) = −4 sin(x − pi over 2)

f(x) = 4 cos(x − pi over 2)

f(x) = −4 cos(x − pi over 2)

Answer 1

i think its either A or C.

Answer 2

OK, we will work with those first then.

Answer 3

But

Answer 4

it looks like a sin graph.

Answer 5

That's true, but does it look exactly like a sin graph? Sin graphs usually go UP then DOWN, not DOWN then UP, it's as if it is upside down.

Answer 6

OHH Its COS.

Answer 7

Maybe so, let's keep our eyes open and watch for any traps they might try to catch us with.

Answer 8

okay.

Answer 9

I'm going to draw what sin and cos usually look like so that we have the same picture in our heads.