Bug: Trig functions are broken and other weirdness
On Firefox and Edge:
For example cos(#45) is showing ": Error. [DecimalError] Precision limit exceeded" Similar errors for sin() and tan()
On Chrome the calculator just doesn't display at all.
2 comments

Cscotty commented
Perhaps the author is either no longer interested for can't reproduce the issue as it's still broken. Here are some steps to reproduce it.
1) Set precision to 9
2) calculate tan(0.78), this will work OK, result is 0.989261537
3) calculate pi/4. this will work OK, result is 0.785398163
4) calculate tan(0.785398163). This will fail with Error. [DecimalError] Precision limit exceede 
Cscotty commented
To add to this, if I change "precision" to 99 I get a result but i's wrong.
For example cos(#45) = 2.71828182845904523536028747135266249775724709369995957496696762772407663035354759457138217852516643