# trigonometric functions

• Nov 12th 2012, 01:50 AM
zotikamaliqi
trigonometric functions
Can someone help me to solve a trigonometric function.To review this function in points

y=3sin(2x+π/4)
(smile)
• Nov 12th 2012, 01:55 AM
fkf
Re: trigonometric functions
Solve for what?
• Nov 12th 2012, 01:57 AM
DeguMan
Re: trigonometric functions
Hello...When you say solve you need to give the function a value.

e.g. If you want to find where the function equals 1.5 then you would be solving 3sin(2x + π/4) = 1.5

Otherwise, you would just have a sketch of the function.

Regards
• Nov 12th 2012, 01:57 AM
zotikamaliqi
Re: trigonometric functions
To rewiew that function in points foe example:
1.)domain
2.)0 of function
the period etc
• Nov 12th 2012, 01:59 AM
zotikamaliqi
Re: trigonometric functions
My mistake sorry .I need a sketch of the function and you know extreme values of the function when it is growing
• Nov 12th 2012, 02:12 AM
zotikamaliqi
Re: trigonometric functions
I haven't been clear i need a sketch of this function y=3sin(2x+π/4).I don't get how to know when it is growing, what period does it have extreme values .Thank you for your time
• Nov 13th 2012, 07:07 AM
fkf
Re: trigonometric functions
Quote:

Originally Posted by zotikamaliqi
I haven't been clear i need a sketch of this function y=3sin(2x+π/4).I don't get how to know when it is growing, what period does it have extreme values .Thank you for your time

Use the derivative y', this gives you the function for were y is growing and decreasing. You also use the y' to calculate the extremevalues.