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Kelas 10 MatematikaBab Trigonometri Dasar
1] sin a = tinggi / sisi miring
sin 30° = tinggi / 10
1/2 = tinggi / 10
tinggi = 10/2
tinggi = 5 m
2] cos a = alas / sisi miring
cos 30° = alas / 10
1/2 √3 = alas / 10
alas = 10 . 1/2 . √3
alas = 5 √3 m