1. ## Trigonometry graph

Help me! I know how to draw graph like sin 2x , 2sin x , sinx +2, sinx -2 but my problem is how to draw for 1-sinx or 2-sinx ? I dont understand the principle behind this. Can anyone explain to me please? Thank You very much.

2. i still don't understand what do you mean?
do you know how to use calcus?

3. Originally Posted by helloying
Help me! I know how to draw graph like sin 2x , 2sin x , sinx +2, sinx -2 but my problem is how to draw for 1-sinx or 2-sinx ? I dont understand the principle behind this. Can anyone explain to me please? Thank You very much.
if you derive all of them, draw it easily.
Do you know derivative?

4. i know the standard graph of sinx, cosx and tanx. I also know that when there is like sinx +2, just shift the sinx graph up by two units. But i dont understand how to draw for 1-sinx or 2-sinx or questions like that. Do u understand me now? Please help me.

5. Hello, helloying!

It takes only a bit of algebra . . .

I know how to draw graph like: $\sin2x,\;2\sin x,\;\sin x +2,\;\sin x -2$
but my problem is how to draw for $1-\sin x$ or $2-\sin x$

If we have: . $y \:=\:2-\sin x$
. . factor out -1: . $y \:=\:-(\sin x - 2)$

You know the graph of: $y \:=\:\sin x - 2$
. . It is the sine curve, lowered two units.

Then: . $y \:=\:{\color{red}-}(\sin x - 2)$ is the same graph
. . reflected ("flipped") over the x-axis.