a quick question... (1 Viewer)

[ToO LaZy ^*]

integral of sec^3xtanx

could someone show me the step my step how to get to the anwer.....1/3sec^3x

 

[George W. Bush]

already done this for you..

 

[ToO LaZy ^*]

oh jebus...you're right..!
*me runs away*

 

[ToO LaZy ^*]

OMG i finally get it!..after looking at the other thread for the 2nd time, i actually understand the differentiation...

thx georgie..the the 2nd time!

 

[ToO LaZy ^*]

oh..hey bush..if you're still here..

how do you do this one:

integral of (cot^2x cosec^2x)dx

thx for the help so far, appreciate it

 

[CM_Tutor]

Use the substitution u = cot x

 

[ToO LaZy ^*]

ok..i'll try that now..

 

[ToO LaZy ^*]

OMG...thx heaps!!
it worked

 

[ToO LaZy ^*]

btw..
is there some sort or substitution that you should use for a particular integral?

ie..like the one above?..

 

[George W. Bush]

Well, many integration questions are of the form
c f'(x) f(x) where c is some constant

so you have to look at the question and identify what u substitution you'll want to remove the f'(x)..

the more questions you do, the better you'll get

 

[ToO LaZy ^*]

ah...icic
that's what my teacher told me..guess there's no other way but work my arse off!