find tan4x? tanx=1/5

@TheMightyThumb Hi, \(\huge \color{red}{\text{Welcome to Open Study}}\ddot\smile\) you can use the formula \(\large \tan2x=\dfrac{2\tan x}{1-\tan^2x}\) to get tan 4x , once to find tan 2x from tan x and once more to find tan 4x from tan 2x

Wait , so whats the answer

you can use the formula to get the answer by yourself! first find tan 2x using that formula, what u get ?

Aslo, its against our code of conduct to give out direct answers, you can check it out : http://openstudy.com/code-of-conduct

I got 5/2 for tan2x. What should I do next?

tan 2x = 2/5 / (1-1/25) = 2/5 /(24/25) = 2*25/ (24*5) = 5/12 did you mean 5/12 and not 5/2 ??

anyways, next will be \(\large \tan4x=\dfrac{2\tan 2x}{1-\tan^22x}\)

Oh mb. Couldnt read my writing lol

using same formula and tan2x = 5/12, find tan 4x :) can you ?

So just plug in 5/12 for tan2x?

yes, absolutely :)

I got 120/119. Is that right? Thanks

That is absolutely correct! good work :) welcome ^_^

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