diketahui tan O = 5/4 , sec O?

Bab Trigonometri
Matematika SMA Kelas X

tan O = 5/4 = y/x

r = √(x² + y²)
r = √(4² + 5²)
r = √(16 + 25)
r = √41

sec O = r/x
sec O = (√41)/4
sec O = 1/4 √41

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