Jawab dengan langkah dan cara Materi trigonometri Kelas X Gunakan cara trigonometri

jawab

1a)
sin 60 = 5/BD
BD = 5/ sin 60
BD = 5/ (1/2 √3)
BD = 10/3 √3

1b)
tan 60 = 5/BC
BC = 5/tan 60 = 5/√3 =  5/3  √3

cos 30 = AC/AD
AC  = AD. cos 30
AC = 10. 1/2 √3
AC = 5√3

AB = AC - BC
AB = 5√3 -  5/3 √3  = (5 - 5/3)√3
AB = 10/3 √3


2a)

cos 45  = DC/BC 
DC = BC. cos 45 
DC = 5√2 . 1/2√2 
DC = 5

sin 45 = BD/BC
BD = BC/ sin 45
BD = 5√2. 1/2 √2
BD = 5

tan 45 = BD/AD
AD = BD/tan45
AD = 5/ 1
AD = 5

AC = AD + DC
AC = 5 + 5
AC = 10