Jawaban:
sudut a = 30°
sudut b = 90°
panjang ab = 18 cm
panjang ac
cos 30° = ab/ac
√3/2 = 18/ac
ac√3 = 36
ac = 36/√3 -- rasionalkan
ac = 36/√3 x √3/√3
ac = 36√3/3
ac = 12√3 cm
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Jawaban:
Jawaban:
sudut a = 30°
sudut b = 90°
panjang ab = 18 cm
panjang ac
cos 30° = ab/ac
√3/2 = 18/ac
ac√3 = 36
ac = 36/√3 -- rasionalkan
ac = 36/√3 x √3/√3
ac = 36√3/3
ac = 12√3 cm