Or you could do: cot=: %@(tan=: 3&o.) sec=: %@(cos=: 2&o.) csc=: %@(sin=: 1&o.)
Thanks, -- Raul On Tue, Aug 15, 2017 at 1:11 PM, Jimmy Gauvin <[email protected]> wrote: > Hi, > > problem is with 4 5 6 which denote the following: > > coh=: 4&o. NB. sqrt (1+(y^2)) > sinh=: 5&o. NB. hyperbolic sine of y > cosh=: 6&o. NB. hyperbolic cosine of y > > see: http://code.jsoftware.com/wiki/Vocabulary/odot#dyadic > > There dosen't seem to be specific numbers for cot, sec and csc. > You have to go by their definition: > > [image: \cot \theta ={\frac {\cos \theta }{\sin \theta }}=\tan \left({\frac > {\pi }{2}}-\theta \right)={\frac {1}{\tan \theta }}] > > [image: \sec \theta =\csc \left({\frac {\pi }{2}}-\theta \right)={\frac > {1}{\cos \theta }}] > > [image: \csc \theta =\sec \left({\frac {\pi }{2}}-\theta \right)={\frac > {1}{\sin \theta }}] > > > > On Tue, Aug 15, 2017 at 12:41 PM, Linda Alvord <[email protected]> > wrote: > >> >> >> Sent from AOL Mobile Mail >> >> >> From: Linda Alvord <[email protected]> >> Date: Tuesday, August 15, 2017 >> Subject: FW: why are there no negative signs for cot,sec and csc? >> Cc: lindaalvord <[email protected]> >> >>  >> >> >> >> >> >> >> >> From: Linda Alvord [mailto:[email protected]] >> Sent: Tuesday, August 15, 2017 11:22 AM >> To: '[email protected]' <[email protected]> >> Subject: why are there no negative signs for cot,sec and csc? >> >> >> >> do=: 13 : '({.y) +(i.{:y)*(--/ 2{.y)%<:{:y' >> >> t=:do 0 2p1 17 >> >> all=:1 2 3 4 5 6 (o."0 1) t >> >> *all >> >> 0 1 1 1 1 1 1 1 0 _1 _1 _1 _1 _1 _1 _1 0 >> >> 1 1 1 1 0 _1 _1 _1 _1 _1 _1 _1 0 1 1 1 1 >> >> 0 1 1 1 1 _1 _1 _1 0 1 1 1 1 _1 _1 _1 0 >> >> 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 >> >> 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 >> >> 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 >> >> >> >> Linda >> >> ---------------------------------------------------------------------- >> For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
