[geometry] updated samples with external libs w.r.t. transform strategies

git-svn-id: http://svn.boost.org/svn/boost/trunk@85329 b8fc166d-592f-0410-95f2-cb63ce0dd405
Modify cosine default evaluation code to call the sin code: less code and better precision.

git-svn-id: http://svn.boost.org/svn/boost/trunk@85333 b8fc166d-592f-0410-95f2-cb63ce0dd405
[utility] Fixes to value_init docs.

git-svn-id: http://svn.boost.org/svn/boost/trunk@85335 b8fc166d-592f-0410-95f2-cb63ce0dd405