Do you mean arccos, arcsin and arctan ?
If that's what you mean, press "2nd" then cos, sin or tan.
I already knew the answer.
But I rarely (not to say "never") submit questions when I don't already know the answer. It's just, as you said, "brain food"
Quelle est la question ?
{x=((((√3×i)2)−(12))(9×((√3568453(32))+(310427))(13)))+((√3568453(32))+(310427))(13)×(−((√3×i)2)−(12))−(13)x=((√3568453(32))+(310427))(13)×(((√3×i)2)−(12))+((−((√3×i)2)−(12))(9×((√3568453(32))+(310427))(13)))−(13)x=(((√3568453(32))+(310427))(13))+(1(9×((√3568453(32))+(310427))(13)))−(13)}
2×2×2×2×2×2×2×2×2×2×2×2×2×2=214=16384
9+10=19
Exactly.
Here's your cookie :
The square root of a positive number n, is a number a which square is equal to n.
a2=n
a% of n= a×n100
So 35% of 100=35×100100=35
Twice as good as I expected: You've got
40/20
You've earned a cookie:
+870 
