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YAY, Thanks Heroic!

Thanks. But i havent learnt that formula in school yet. Is there another way of doing it? But thanks for ur help, I also did get the answer too!

hm...sorry I dont understand. Can you show me what you mean please?

Hey guys, can you help me with this question? Thanks. 1. $Simplify the following$:\frac{3tan(A/3)-tan^{3}(A/3))}{1-3tan^{2}(A/3)}.

How do you do this question? I dont even know where to start apart from factorising. $Show that$\sqrt{8-4\sqrt{3}}=\sqrt{6}-\sqrt{2}

Thanks for the quick reponse dude!

I edited it. One is positive.

This is from Fitzpatrick 3U page 60. Find the values of x for which the following inequations are simultaneously satisfied: x+\frac{1}{|x|}>0 \;$and$\;x^{2}-x-2<0 Full worked solution will be great because this one is a tough one. Thanks

OOO Thanks for the page reference! I get it now, cheers!

Hey Seanieg89, i sort of starting to get your explanation but can you show me an example so I can get it? I think i know what you are saying but can you explain using the question i posted up and tell me why my steps are wrong?

Does that relate to the absolute value function? Is it true to say (\sqrt{x})^2 = (\sqrt{x^2}) = |x| ?

Oh...then what does ](\sqrt{x})^2 equal to?

Anyone? Please, this question is bugging me! haha

I know the answer is no solution but when I mucked around with the equation I got x = 1 (which is wrong). I just need someone to justify why my steps leading to x =1 is incorrect because all the steps seem fine to me at this point. Where's carrotsticks when you need him! Spiral! Drongoski (I...

Hey BOS, I need help with a math question. The question was to solve: 1+x^(-1/2)=0 I did all the working out and got to the step where: sqrt(x)=-1 And I know that there is no real solutions. But then I went and did this, x=(-1)^2 = 1 I know x = 1 is wrong because if...