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# Integrating Trignometric stuff watch

1. I have to integrate 1/cos^2x sin^2x

I get to the point with 2(integralsign)1/1-cos(u)du where u= 4x

I don't know what to do next.
2. (Original post by Nirm)
I have to integrate 1/cos^2x sin^2x

I get to the point with 2(integralsign)1/1-cos(u)du where u= 4x

I don't know what to do next.
I'd go back a step to where you had (sin(2x))^2 in the denominator, which becomes (cosec(2x))^2 when you flip it up, and it's then a standard integral.
3. (Original post by ghostwalker)
I'd go back a step to where you had (sin(2x))^2 in the denominator, which becomes (cosec(2x)^2 when you flip it up, and it's then a standard integral.
two ways of doing this but I am not sure of your notation.

EDIT: I am gone...
4. (Original post by ghostwalker)
I'd go back a step to where you had (sin(2x))^2 in the denominator, which becomes (cosec(2x))^2 when you flip it up, and it's then a standard integral.
I never had a (sin(2x))^2 for some reason . I just made cos^2x sin^2x= 1-cos(4x)/8 (all over 8).
I am probably not seeing a simple step right now not sure how to get (sin(2x))^2
5. (Original post by Nirm)
I never had a (sin(2x))^2 for some reason . I just made cos^2x sin^2x= 1-cos(4x)/8 (all over 8).
I am probably not seeing a simple step right now not sure how to get (sin(2x))^2
Sin(2x)=2sin(x)cos(x)
Squaring both sides gives a big hint in the right direction. You will soon have your integral in the form of a nice one.

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6. (Original post by Nirm)
I have to integrate 1/cos^2x sin^2x

I get to the point with 2(integralsign)1/1-cos(u)du where u= 4x

I don't know what to do next.
Is this supposed to be

or

If you don't know Latex, at least help us out with a few extra brackets
7. (Original post by davros)
Is this supposed to be

or

If you don't know Latex, at least help us out with a few extra brackets
Yeah i dont know latex, need to learn it. Makes everything so clear. Also it is the bottom one.
8. (Original post by Skαteboαrder)
Ah okay i will try that. Thanks
9. (Original post by Nirm)
Yeah i dont know latex, need to learn it. Makes everything so clear. Also it is the bottom one.
look at Q317 in the link

sorry but the down load time is over 5 min
10. (Original post by TeeEm)
look at Q317 in the link

sorry but the down load time is over 5 min

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