5

Is there a way to calculate inverse trigonometric functions in El Capitan's Calculator (ie. arcsine, arccosine, arctangent, etc.)? I've tried the usual alt, cmd, ctrl modifiers with the sin/cos/tan buttons to no avail. I'm especially annoyed because Spotlight does calculate arctangents and the result is claimed to come from Calculator itself, so I don't know if they dumbed the interface down or what.

Examples of operations that work from Spotlight but I have no clue how to do from Calculator:

atan(1)  # arctangent of 1 in radians
atand(1) # arctangent of 1 in degrees
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Hit the shift key in Calculator in older versions of OS X to get all inverse trigonometric but also some other functions:

enter image description here

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In El Capitan it works with the "2nd" button (the real keyboard's shift key should work as well):

enter image description here

enter image description here

| improve this answer | |
  • D'oh, the 2nd button did it. But shift did not. Any idea why? I'm expecting the buttons to switch to their alternate functions while I keep it pressed, but nothing happens. – jamarju Sep 18 '16 at 21:06
  • I can't get calculator to show the inverse functions. MacOS 10.13.5 (High Sierra). Are these still valid? I tried pressing or keeping pressed SHIFT but nothing. As for the "2nd button" I can't understand which exactly is this on the keyboard. Is it a key or a combination? – Andrei Rînea Jul 16 '18 at 9:41
  • @AndreiRinea its 2nd button in the calculator interface, not a key from the keyboard, hope you solve it – Carlos Med May 11 '19 at 1:40
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To calculate atan() and atand() in Calculator under OS X El Capitan, do the following…

  1. Open Calculator.

  2. Press command2 on the Mac’s keyboard, to show the Scientific Calculator.

  3. To calculate inverse trigonometric functions, click the 2nd button (left side, second row, first button) on the calculator (or you can press and hold the shift key on the Mac’s keyboard during a given operation) in order to change the tan button to display as: tan -1

  4. To change between calculating degrees and radians, toggle the button in the lower left corner of the Scientific Calculator between Deg and Rad.

    • The default is to calculate degrees and the Rad button is shown.
    • To calculate radians, click the Rad button so it shows Deg. Note that Rad also appears in the left side of the main display.

Result for atand(1):

atand(1)


Result for atan(1):

atan(1)

| improve this answer | |
  • It was somewhat strange to get such big radians, haha. Thanks for pointing out that degrees are the default – jmm Jan 11 '18 at 14:27
  • I can't get calculator to show the inverse functions. MacOS 10.13.5 (High Sierra). Are these still valid? I tried pressing or keeping pressed SHIFT but nothing. As for the "2nd button" I can't understand which exactly is this on the keyboard. Is it a key or a combination? – Andrei Rînea Jul 16 '18 at 9:41
  • 1
    @Andrei Rinea Yes, what I've stated in my answer is still valid for macOS 10.13.5 As to which is the 2nd button, well I've plainly and clearly described which button it is and as shown in the images it's clearly visible. I'd suggest you reread the answer and pay particular attention to #3. – user3439894 Jul 16 '18 at 14:45
  • Oh, wow, thanks! I was looking for the 2<sup>nd</sup> button on the physical keyboard (duh!!!) – Andrei Rînea Jul 16 '18 at 14:47

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