What is the basic trig function of a graph that starts at 1 on the y axis, then goes down 1 on the y axis at 3 on the x axis. (It's a wave).

Question

What is the basic trig function of a graph that starts at 1 on the y axis, then goes down 1 on the y axis at 3 on the x axis.  (It's a wave).

anonymous · Answer

cos

anonymous · Answer

Wow how do you know that?

saifoo.khan · Answer

is it?

anonymous · Answer

and its not 3, its $$\pi$$

anonymous · Answer

anonymous · Answer

Ohhhh is it because it starts on the y axis and goes down?  And what are each of the tick marks?

anonymous · Answer

nevermind i read it wrong

anonymous · Answer

cosine goes to -1 at pi, you are looking for a function that "goes down one" at pi

anonymous · Answer

Where is pi?  The curve 's middle is at the third grid mark... ("grid marks are spaced 1 unit apart")  What does each of the units mean?

anonymous · Answer

probably just 1

anonymous · Answer

pi is just a number, happens to be about 3.1415926...etc

anonymous · Answer

so when you say 3 on the x axis, its quite likely you are actually talking about pi which is close to 3, but important to note the difference.