Jawabanmu

2014-08-31T21:23:49+07:00
2014-08-31T21:24:31+07:00
Pakai deret Taylor.
Sin x = x - (x^3)/3! + (x^5)/5! - ... + ... ...
Dgn x dlm radian.
Misal.
Sin 37 = ?
37 drjt = 37 . (phi/180) = 0,646 (dgn pembulatan 3 angka desimal).
Maka didapat.
x = 0,646
x^3 = 0,269
x^5 = 0,112
3! = 6
5! = 120
*
masukkan dlm pers dret Taylor.
Sin (0,646)
= 0,646 - (0,269/6) + (0,112/120)
= 0,646 - 0,045 + 0,001
= 0,602
*
jd Sin 37 = 0,602
cek pake kalkulotor hsilnya 0,6018...
*
Sin 53
= sin (90-37)
= cos 37
*
(cos 37)^2
= 1 - (sin 37)^2
= 1 - (0,602)^2
= 1 - 0,362
= 0,638
cos 37 = akar (0,638) = 0,799