# Solving basic Trigonometry equations on a Ti-84 Plus [closed]

I am trying to solve some equations for example: tanθ = 2/4 or tan15 = x/30 but I do not know how I would use a Calculator to solve these as I do not know how to format them or which symbols to use for θ and x, thanks.

## closed as off-topic by JonMark Perry, Watson, Nikunj, MCT, Emilio NovatiMay 29 '16 at 15:13

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• This is probably not the site for this. You should consult the manual or google. Anyway, there should be a function $\tan^{-1}$ (possibly above the $\tan$ button). Then to solve for $\theta$, punch in $\tan^{-1}(2/4)$. For the second one, punch in $30*\tan(15)$. You aren't literally going to put in $\tan \theta = 2/4$ in the calculator screen because it is a calculator not a solver. You do the solving. – Em. May 29 '16 at 13:02
• Yes, Thank you very much. – alexo1001 May 29 '16 at 13:08