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= 3 / 5
jadi rusuk = depan = 3
miring = 5
samping = 4
karena tan α bernilai positif maka sudut tersebut berada pada kuadran III
cosα = - samping / miring
= - 4/5
cot α = samping / depan
= 4/3
secα = 1/cos α
= -5/4