Calculus

If we were to integrate something like (cos(x)^4)(sin(x)^9)

Why not do it like this...

INT(cos(x)^3）(sin(x)^9)ｄ(sin(x))

THEN

= INT(cos(x)2）(sin(x)^9)ｄ(sin(x)^2)

...

= INT(sin(x)^9) d (sin(x)^5)

= INT((sin(x)^5)^log<5>(9))d(sin(x)^5)

dx is not d times x, you tard.  If you want to change the integration variable (to d sin(x), for example) you need to do it correctly.  Look up change of variables.

http://www.wolframalpha.com/input/?i=%28cos%28x%29^4%29%28sin%28x%29^9%29