2008-10-02, 07:28 PM
(This post was last modified: 2008-10-02, 07:30 PM by Worthyness.)
inte[sqrt(144(cos²(2t) + sin²(2t)) + 25)]dt
What you are doing is u substitution. in order for your theory to be viable, you would have to do the following:
u= 2t --> du = 2 dt
so technically the answer you have is wrong since you did not compensate for the 2dt...
But all the other math workings i can't do, since i'm not in a high level calculus class =P
i.e. no clue how to do this... but you can do the u thingy if you compensate for the dt part...
What you are doing is u substitution. in order for your theory to be viable, you would have to do the following:
u= 2t --> du = 2 dt
so technically the answer you have is wrong since you did not compensate for the 2dt...
But all the other math workings i can't do, since i'm not in a high level calculus class =P
i.e. no clue how to do this... but you can do the u thingy if you compensate for the dt part...