Cos(pi/2) gives an exact zero. Cos(3*pi/2) gives a value less than €. But cos(7*pi/2) gives a large negative value which is not less than €. Anshu On Thu, 16 Jan, 2020, 11:29 PM John Maddock via Boost, < boost@lists.boost.org> wrote:
On 16/01/2020 15:08, anshu khare via Boost wrote:
cos(3*pi(cpp_bin_float_50>()/2)) does not give correct value.
What do you call "correct"? If you're expecting an exact 0 result, then you're going to be disappointed - likewise with double which also does not yield an exact 0 in your test case (at least on msvc).
John.
Only cos(pi(cpp_bin_float_50>()/2)) gives correct value. All odd multiples of cos(pi/2) do not give correct value.
The issue with sin() as well.
Anshu
_______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
_______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost