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depan = √3
miring = 3
samping = √3² - (√3)²
= √9 - 3
= √6
kuadran pertama = semuanya positif
SinA = depan / miring = √3 / 3
CosA = samping / miring = √6 / 3
TanA = depan / samping = √3 / √6
= √18 / 6
= 3√2 / 6
= 1/2 √2