In[]:=
IntegrateArcCos
Cos[w]
1+2Cos[w]
,{w,0,Pi/3}
Out[]=
$Aborted
In[]:=
NIntegrateArcCos
Cos[w]
1+2Cos[w]
,{w,0,Pi/3},WorkingPrecision->20
Out[]=
1.3159472534785811492

In[]:=
1.3159472534785811492
Input interpretation
1.3159472534785811492
Number line
Rational form
3289868133696452873
2500000000000000000
= 1 +
789868133696452873
2500000000000000000
Number name
one point three one five nine four seven two five three four seven eight five eight
Continued fraction
Fraction form
[1; 3, 6, 17, 2, 1, 1, 31, 3, 2, 9, 2, 1, 81, 3]
Possible closed forms
More
4ζ(2)
5
≈1.31594725347858114917793
2
2
π
15
≈1.31594725347858114917793
1
30
2

A
≈1.31594725347858114917793
ζ(2) is zeta of 2 »
P_A is Plouffe's A-constant »