why x prim= xcos theta + y sin theta

[mehdihn]

Hi , I am looking for why x prim= xcos theta + y sin theta 5 hour in the internet.
thanks so much you. i understand it by your posts. again , i thank you so so much.

 

[mmm4444bot]

I [have been] looking for why x prime = x cos theta + y sin theta [for 5 hours on] the internet.
thanks so much you. i understand it by your posts. again , i thank you so so much.

We are happy that you found your answer.

 

[mehdihn]

thanks

We are happy that you found your answer.

I am very happy for your Reply and thank you .