Explain how the graph of y = a sin (bx + c) changes for different values a, b, and c.

May I suggest you try the following:
Use a calculator or graphing software to experiment and look for patterns. Graph:
y= sin (x), y=2 sin(x), y= 3 sin(x), then y= 0.5 sin (x) and then y = -1×sin(x).
Then you tell us what effect a multiplier has out the front.
Can you summarize how y=a×sin(x) compares with y=sin(x)?

Then do a similar thing with y= sin(x) and y = sin (bx).

We can tell you but you'll understand it heaps better if you work it out for yourself.
 
Explain how the graph of y = a sin (bx + c) changes for different values a, b, and c.

I am not able to find a good answer of it.
Have you learned about transformations, such as vertical and horizontal stretches and shifts or translations?

If so, then you can just apply those ideas. I find it easiest if you rewrite the formula as y = a sin (b(x + c/b)).
 
I am not able to find a good answer of it.

Do you know the definitions of:

Wave function​
Amplitude (of wave function)​
Time period (of wave function) and​
Phase shift (of wave function)​
 
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