Added support for asin, acos
Tests added
test name changed
Ecpression changed
Merge branch 'master' into 2850_seq
Merge pull request #2976 from rajat974/2850_seq

Issue #2850 solved. Integration doesn't halt now.
Add rajat974 to the AUTHORS/aboutus. Welcome to SymPy!
Shift numbers after merging pr #2976

Merge branch 'master' into shift-issue-numbering
Fix test for issue 4403