COS

TYPE DU CALCUL

Calcul de ç.

log(- tangcp) ï,5t843i8i

180" — <ï> io°53'36",a

iao"-+-|= 180°

Calcul de x..

logl/y.

o,485oi84

logcos| T,743387&

log x, o,2284o6o>

TRAITÉ DE TRIGONOMfiTRIB

Calcul (te J7,.

log

log cos

o,485oi84 T, 6475280

logl/y

logx,.

Calcul fie Xy o,485oi84

log — cosf i2o"-h|j . '1,9991270

o,i325464Jlog( — ^,) 0,4841454