## anonymous 3 years ago explain how to Find the amplitude of y = 3 sin x.

1. anonymous

y = A * sin(bx) A = amplitude what is it?

2. anonymous

3

3. anonymous

you got it see how easy it was

4. anonymous

Describe the transformations required to obtain the graph of the function f(x) from the graph of the function g(x). f(x) = 9 cos x; g(x) = cos x

5. anonymous

what do you multiply g(x) to get f(x)?

6. anonymous

9

7. anonymous

A.Horizontal stretch by a factor of 9 B.Vertical stretch by a factor of 9 C.Horizontal shrink by a factor of 1over9 D.Vertical shrink by a factor of 1over9

8. anonymous

B.Vertical stretch by a factor of 9

9. anonymous

you can graph them and see the change

10. anonymous

how do you graph y=2/3sin1/2x

11. anonymous

2/3 is the amplitude correct? plug in values for x y=2/3sin1/2x x=0; y = 0 can you try it then i will go over it with you

12. anonymous

this is a differnt question it says find thet graph that goes with y= 2 --- sin 1 3 ---- 2 x

13. anonymous

is that the question?$\frac{ 2 }{ 3 }*\sin(\frac{ 1 }{ 2x })$

14. anonymous

sara you there?

15. anonymous

its not 2x its 1/2 x

16. anonymous

1 --- x 2

17. anonymous

ok amplitude is 2/3 period is $0 \le x \le \frac{ 2*\Pi }{ 1/2 }$

18. anonymous

19. anonymous

20. anonymous

plug in 0 what do you get $\frac{ 2 }{ 3 }*\sin{\frac{ 1 }{ 2 }*0}$

21. anonymous

+ you have the amplitude; which graph shows the right amp?

22. anonymous

how do i know which graph shows 2/3

23. anonymous

all graphs has marked where 1 is