Materi TRIGONOMETRI Tingkat SMA Kelas X

BC/sin A = AC/sin B
a / sin 30˚ = b / sin 60˚
a/(1/2) = b / (1/2 √3)
2a = 2b /√3
a√3 = b

catatan :
a+b = 10
a = 10 - b
a = 10 - a√3
a + a√3 = 10
a( 1 + √3) = 10
a = 10/(1 + √3)
a = (10 - 10√3)/-2
a = 5√3 - 5

a/ sin 30˚ = AB / sin C
a/ (1/2) = AB / sin 90˚
2a = AB
AB = 2 ( 5√3 - 5)
AB = (10√3 - 10) cm .........C