I'm a bit confused at the moment. All my books say that normal and inverse trig.functions cancel eachother out like this(adsbygoogle = window.adsbygoogle || []).push({});

[tex]\sin(\arcsin(x))=x[/tex] and [tex]\arcsin(sin(x))=x[/tex]

But when I try this out on my calculator - TI-89 - it only wants to recognize the first equation as being equal to x. Is that true or...?

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# Normal and inverse trig functions cancel each other out

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