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I am making a calculator app and would like to know: Which of the following functions would be used more often:

  • $\sin()$
  • $\sinh()$
  • $\text{arsin}()$ ($\sin^{-1}$)
  • $\text{arsinh}()$ ($\sinh^{-1}$)
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just fyi, the inverse to $\sinh$ is the $\text{arsinh}$, $\text{asinh}$ is incorrect (this notation is used for inverse functions of $\sin$ etc). I thought you ought to know, as you are writing a calculator app ;) –  CBenni Jan 2 '13 at 23:43
    
@CBenni Thanks a ton! –  Undo Jan 2 '13 at 23:46
1  
And it's arcsin, not arsin. –  mrf Dec 9 at 22:51

2 Answers 2

up vote 7 down vote accepted

$\sin$ will be used much more often than $\sinh$. As for the inverses, I would expect a calculator to have an INV button which changes all trigonometric functions to their inverses.

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Thanks! You just changed how my app works! (Good Thing) –  Undo Jan 2 '13 at 23:26
1  
@ErwaySoftware No problem. Although your design need not mimic hardware calculators, you should still consider what your users may expect of calculators. For example, a popular one in the U.S. is TI-84. –  user53153 Jan 2 '13 at 23:29
    
Yes. I happen to have a TI-84. It's all about UX in this world... –  Undo Jan 2 '13 at 23:33

My experience tells me that $sin^{-1}$ will be pressed the most, then $sin$.

To be honest, I never used the other two buttons in any of high-school problems (and in my basic physics course)

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Thanks! Will take into consideration! –  Undo Jan 2 '13 at 23:32

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