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    Hi please could someone help me with exercise 3.3 on the attached sheet. I've gotten to ln(1+tan(theta/2)/1-tan(theta/2)) and have no idea how to progress from there. Been stuck for hours..
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    (Original post by jordanwu)
    Hi please could someone help me with exercise 3.3 on the attached sheet. I've gotten to ln(1+tan(theta/2)/1-tan(theta/2)) and have no idea how to progress from there. Been stuck for hours..
    Multiply by \frac{1+\tan(\theta /2)}{1+\tan(\theta /2)} and then rearrange a bit.
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    (Original post by 16Characters....)
    Multiply by \frac{1+\tan(\theta /2)}{1+\tan(\theta /2)} and then rearrange a bit.
    I've got ln(1+2tan(theta/2)+tan^2(theta/2)/1-tan^2(theta/2)) now, the answer needs theta not theta/2 in it but I'm not sure what I'm supposed to do now
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    (Original post by jordanwu)
    I've got ln(1+2tan(theta/2)+tan^2(theta/2)/1-tan^2(theta/2)) now, the answer needs theta not theta/2 in it but I'm not sure what I'm supposed to do now
    Split it into two fractions and see if you recognise them.
 
 
 
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