I am using a function, and the outputs are below. What function am I using?
function($0+0$) = 0
function($73942856-628529469252$) = -1
function($1 + 1$) = 1
function($1+2$) = 1
function($528^0$) = 1
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2 Answers
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It could be
The $sign$ function, which maps positive values to 1, negative values to -1, and 0 to 0.
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I propose
$$f(x) = 0.09388 + 0.62997atan(x) - 0.09388cos(x) + 0.186498sin(x)$$
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$\begingroup$ Good try, but the question has already been answered $\endgroup$ Commented Sep 7, 2018 at 19:11
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$\begingroup$ Oh my... this answer, I swear, hahah. Just a quick question: by $\rm atan$${}$$(x)$ do you mean $\rm arctan$${}$$(x)$? :P $\endgroup$– Mr PieCommented Sep 7, 2018 at 21:39
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$\begingroup$ Thanks for the clarification. To be honest, I sometimes can't be bothered writing $\arctan$,so I quite prefer $\rm atan$ :P $\endgroup$– Mr PieCommented Sep 11, 2018 at 21:21