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    http://www.madasmaths.com/archive/iy...apers/c3_h.pdf

    Need help in Question 9.I applied the tan(2theta) identity and found cot(2theta) through it but I don't really get what to do next.
    Thanks in Advance!
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    (Original post by sabahshahed294)
    http://www.madasmaths.com/archive/iy...apers/c3_h.pdf

    Need help in Question 9.I applied the tan(2theta) identity and found cot(2theta) through it but I don't really get what to do next.
    Thanks in Advance!
    Find \tan(4\theta) in the same way since you know \tan(2\theta)
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    (Original post by sabahshahed294)
    http://www.madasmaths.com/archive/iy...apers/c3_h.pdf

    Need help in Question 9.I applied the tan(2theta) identity and found cot(2theta) through it but I don't really get what to do next.
    Thanks in Advance!
    Find  \tan 4\theta by using the identity which you have already used (pretty much)  \displaystyle \tan 4\theta =\frac{2\tan 2\theta }{1-\tan^ 2 2\theta } .
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    (Original post by sabahshahed294)
    http://www.madasmaths.com/archive/iy...apers/c3_h.pdf

    Need help in Question 9.I applied the tan(2theta) identity and found cot(2theta) through it but I don't really get what to do next.
    Thanks in Advance!
    You know, for example that \tan 4\theta = \frac{2\tan 2\theta}{1 - \tan^2 2\theta} and that \cot 2\theta = \frac{1}{\tan 2\theta}, so you can simplify \cot 2\theta \tan 4\theta nicely.

    Can you take it from here?
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    (Original post by Zacken)
    You know, for example that \tan 4\theta = \frac{2\tan 2\theta}{1 - \tan^2 2\theta} and that \cot 2\theta = \frac{1}{\tan 2\theta}, so you can simplify \cot 2\theta \tan 4\theta nicely.

    Can you take it from here?
    Yes, I could. Thank you!
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    (Original post by B_9710)
    Find  \tan 4\theta by using the identity which you have already used (pretty much)  \displaystyle \tan 4\theta =\frac{2\tan 2\theta }{1-\tan^ 2\theta } .
    Yup done. Thanks for your time
    It's 1-tan2 (2theta) btw.
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    (Original post by sabahshahed294)
    Yes, I could. Thank you!
    Great!
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    (Original post by Zacken)
    Great!
    Btw, Congratulations on your results(I know it's late but I saw now. haha)
    Pretty cool! Which subject did you get an A in? (If you don't mind me asking. )
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    (Original post by sabahshahed294)
    Btw, Congratulations on your results(I know it's late but I saw now. haha)
    Pretty cool! Which subject did you get an A in? (If you don't mind me asking. )
    Thank you very much! Did you get any results as well - AS or GCSE?

    I ended up with A*A*A in M, FM and Physics respectively.
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    (Original post by Zacken)
    Thank you very much! Did you get any results as well - AS or GCSE?

    I ended up with A*A*A in M, FM and Physics respectively.
    Wow. Awesome!
    I did my A2 this year.Did Physics, Chemistry and Maths this year but I couldn't do well in some units such as C34, Physics 5,Physics 6 and Chemistry 5 (I'm an International Student so I'll be reappearing for C34 and Chemistry 5 in January.) Rest of the A2 Units I got A's except for a B in Physics 4 . I hate A Level Physics a lot lol.(Especially Edexcel, I did CIE for IGCSEs which was far better than this)
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    (Original post by sabahshahed294)
    Wow. Awesome!
    I did my A2 this year.Did Physics, Chemistry and Maths this year but I couldn't do well in some units such as C34, Physics 5,Physics 6 and Chemistry 5 (I'm an International Student so I'll be reappearing for C34 and Chemistry 5 in January.) Rest of the Units I got A's except for a B in Physics 4 . I hate A Level Physics a lot lol.(Especially Edexcel, I did CIE for IGCSEs which was far better than this)
    Oh right, of course! Now I remember! Well done nevertheless and good luck for Jan! Are you applying to the UK for uni?
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    (Original post by Zacken)
    Oh right, of course! Now I remember! Well done nevertheless and good luck for Jan! Are you applying to the UK for uni?
    Thank you so much.
    I'm trying for Australia and UK both actually. But Idk whether my grades will be acceptable for UK. UK is quite harsh in it's requirements than Australia. (Although the unis are superb!) You're going to Cambridge I see

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