diketahui tan∅=12/5 nilai cos ∅ adalah... A.9/4 B.1/4 C.3/2 D.2/3 E.5/13 tolong pake cara

tan∅ =12/5 = depan/samping
miring= √5²+12²= 13
cos∅ = samping/miring = 5/13

Bab Trigonometri
Matematika SMA Kelas X

tan θ = 12/5 = y/x

r = √(x² + y²)
r = √(5² + 12)²
r = √(25 + 144)
r = 13 cm

cos θ = x/r = 5/13

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