Please help me out with sine and cosine.
I know that sin is `opposite/hypotenuse` in a right angled triangle and cos is `adjacent/hypotenuse`. But when i come across functions like for Eg. In Flash :-

`something.x = Math.cos(someNumber) * someotherNumber;`

`something.z = Math.sin(someNumber) * someotherNumber;`

what does it actually do? My stack overflows when i see such things. I don't understand trignometry that well. What is the opposite and what exactly is the hypotenuse in the above lines? And why does it use `cos` on one line and `sin` on other? Is there any shortcut for calculating these kind of things? Please help me. These things i didn't understand even when i took computer graphics classes and unfortunately even when i asked to my lecturer, she always used to tell, these things you already studied when you were in 7th grade. But i really don't remember that i studied anything like this. 

Thanks in advance :)
Please help me out with sine and cosine.
===

I know that sin is `opposite/hypotenuse` in a right angled triangle and cos is `adjacent/hypotenuse`. But when i come across functions like for Eg. In Flash :-

`something.x = Math.cos(someNumber) * someotherNumber;`

`something.z = Math.sin(someNumber) * someotherNumber;`

what does it actually do? My stack overflows when i see such things. I don't understand trignometry that well. What is the opposite and what exactly is the hypotenuse in the above lines? And why does it use `cos` on one line and `sin` on other? Is there any shortcut for calculating these kind of things? Please help me. These things i didn't understand even when i took computer graphics classes and unfortunately even when i asked to my lecturer, she always used to tell, these things you already studied when you were in 7th grade. But i really don't remember that i studied anything like this. 

Thanks in advance :)