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    Could anyone show me how to go about integrating this please?

    2/ (cos^2 x/2)

    Its from the Exexcel P3 Textbook, Exercise 4a, question 16 on page 107 if anyone has it.

    Thanks loads,

    Emma xxx
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    (Original post by Emz)
    Could anyone show me how to go about integrating this please?

    2/ (cos^2 x/2)

    Its from the Exexcel P3 Textbook, Exercise 4a, question 16 on page 107 if anyone has it.

    Thanks loads,

    Emma xxx
    is this written as:

    2/[cos (0.5) x]^2
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    it's the integral of sec² which is tan
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    It's written as I first wrote it:

    2
    ________
    cos² x/2

    Is that any easier to see?

    Emma xxx

    P.S. Thanks elpaw, I understand that is where I'm heading but I need the actual method
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    ok, its 4tan(x/2) +C
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    Could you explain why its 4 please?

    Emma xxx
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    because wen the half comes out, it becomes 4*1/2 = 2.
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    (Original post by Emz)
    Could you explain why its 4 please?

    Emma xxx
    1/cos^2 = sec^2

    Integrate sec^2, you get tan.
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    Aah right, thank you elpaw!!

    Emma xxx
 
 
 
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Updated: March 14, 2004
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