Google-search – How to let Google Calculator take degrees for sine/cosine calculation

I tried this two google search queries

• scala category:Computer & Electronics / Programming
• scala category:food

and its working correctly.

There is no documentation for what functions the Google Search Graphing Calculator can support (see diatribe for the why).

From what I have witnessed, the calculator can only graph three types of functions.

• Trigonometric
• Polynomial
• Absolute value

I have only tested the above in 2D space but I believe they also work and 3D spatial coordinates as well.

It seems Google looks to users to do some of their documentation for them. I don't think the Google Search Graphing Calculator even has an official website (just a blog).

Diatribe
I have experienced this same issue on several occasions with Google products. The things Google focuses on are usually explained in a adequate manner, but for other less noticeable features there is little to no explanation at all. For example, the Google Voice service is able to store all of your conversations in an organized way but there is little documentation on how to organize historical phone calls/text/voice mails. I couldn't even find the name for the "conversation" or "historical record" or whatever it is these items are called (never did find an answer even after contacting Google directly).