# graphing trig functions

• Mar 2nd 2010, 10:16 PM
slapmaxwell1
graphing trig functions
i have forgotten how to graph these kinds of functions, can someone help?

y = -2 + 3sin((x/2)-(pi/4))? i think 3 is the amplitude the -2 means its gonna be lowered right? and the stuff inside the parenthesis is the period? im not sure. thanks in advance. is there a good study pack/guide for learning this?
• Mar 2nd 2010, 11:13 PM
Prove It
Quote:

Originally Posted by slapmaxwell1
i have forgotten how to graph these kinds of functions, can someone help?

y = -2 + 3sin((x/2)-(pi/4))? i think 3 is the amplitude the -2 means its gonna be lowered right? and the stuff inside the parenthesis is the period? im not sure. thanks in advance. is there a good study pack/guide for learning this?

For a trigonometric function of the form:

$\displaystyle y = a\sin{\left(bx - c\right)} + d$

$\displaystyle a$ is the amplitude

$\displaystyle \frac{2\pi}{b}$ is the period

$\displaystyle c$ is the horizontal translation

$\displaystyle d$ is the vertical translation.