what's the integral of (tanx)^2

[jessicak]

i don't need to know how to integrate it and my book doesn't have this one on a formula sheet and I was just wondering if anyone knew of the top of their heads what the answer is. Thanks

 

[GiLtY]

Hint: Think about a trig identity that involves Tangent^2 and Secant^2

--GiLtY

 

[MustangSVT]

dual tank?

edit-- oops.. it was Tangent X not tank^2.

😛

 

[Vortex22]

I don't know what I'm talking about... but I found this.
It says the answer is (tan^2)(x^3)/3

 

[RaynorWolfcastle]

Listen to GiLty, that's the right method and solving it is easy.

 

[PowerMacG5]

int(tan(x)^2)dx = int(sec(x)^2-1)dx

Then its simple from there.

 

[DrPizza]

Originally posted by: Vortex22
I don't know what I'm talking about... but I found this.
It says the answer is (tan^2)(x^3)/3

Should have clicked on the link that shows how to input the integral... you typed it in wrong.

 

[MichaelD]

Originally posted by: Marauder911
int(tan(x)^2)dx = int(sec(x)^2-1)dx

Then its simple from there.

Oh yeah...absolutely.....PFFFT!!!

After getting thru so many years on this earth, I still can't believe that there are humans that can actually make sense of sh2t like this...I mean, WTF do you USE this FOR? 😕

 

[RaynorWolfcastle]

Originally posted by: MichaelD

Originally posted by: Marauder911
int(tan(x)^2)dx = int(sec(x)^2-1)dx

Then its simple from there.

Oh yeah...absolutely.....PFFFT!!!

After getting thru so many years on this earth, I still can't believe that there are humans that can actually make sense of sh2t like this...I mean, WTF do you USE this FOR? 😕

building your computer, car, and many other things... I'm serious, too.

 

[MichaelD]

Originally posted by: RaynorWolfcastle

Originally posted by: MichaelD

Originally posted by: Marauder911
int(tan(x)^2)dx = int(sec(x)^2-1)dx

Then its simple from there.

Oh yeah...absolutely.....PFFFT!!!

After getting thru so many years on this earth, I still can't believe that there are humans that can actually make sense of sh2t like this...I mean, WTF do you USE this FOR? 😕

building your computer, car, and many other things... I'm serious, too.

I can build a PC, frame a house, tape and float sheetrock, paint, do basic household wiring, rebuild an engine, field strip an M16 in the dark, solder a small PCB, clean a bathroom, do needlepoint, cook Italian food that would make Emiril go "BAM!" but yet I have no use for this equation. If I can't use it, it's friggin' useless. 😛