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tgα = 0,75
tgα = de/sa
tgα = 75/ 100
sin α = de / mi
mi = √de²+sa²
mi = √75²+100²
mi = 125
de : mi : sa = 75 : 125 : 100 = 3 : 5 : 4 (biar gampang,triple phytagoras)
sin α= de/mi = 3/5 = 0,6
secanα = 1/cos = mi/sa = 5/4
cosα = sa/mi = 4/5 =0,8