ŞEVVAL58 15:43 21 Nis 2011 #1
s-1)a=arctan2-arctan1/2 ise tana=? (3/4)
s-2)arctan1/3+ arctan2/3= xise tan x=? (9/7)
s-3)tan(arctan1/5 +atctan3) =? (8)
s-4)arctan1/2+arctan1/3=? (pi/4)
s-5)cos(arccos12/13 + arcsin8/17) =? (140/221)
lütfen yardım edin nolur
Serkan A. 00:44 22 Nis 2011 #2
C-1) arctan2=a ve arctan1/2=b olsun. Ozaman tana=2 ve tanb=1/2 olur.
tan(arctan1/3)+ tan(arctan2/3)
1-tan(arctan1/3).tan(arctan2/3)
C-3) tan(arctan1/5 +atctan3)=
C-4) arctan1/2+arctan1/3=x olsun.
tanx=tan(arctan1/2+arctan1/3)=
tanx=1 ise x=45⁰ dir.
C-5) cos(a+b)=cosa.cosb-sina.sinb
arccos12/13=a olsun. cosa=12/13 dir ve dik üçgenden sina=5/13
arcsin8/17=b olsun. sinb=8/17 dir ve dik üçgenden cosb=15/17
cos(arccos12/13 + arcsin8/17) =cos(a+b)=cosa.cosb-sina.sinb=(12/13).(15/17)-(5/13).(8/17)=140/221
ŞEVVAL58 18:51 22 Nis 2011 #3
sağolun hocam
Diğer çözümlü sorular alttadır.