tan alpha = 3/4 (alpha sudut lancip). Maka sin alpha + tan alpha adalah =

tanA = 3/4
r² = y² + x² = 3² + 4² = 25
r = 5
sinA + tanA = y/r + 3/4 = 3/5 + 3/4 = 27/20

Bab Trigonometri
Matematika SMA Kelas X

tan α = 3/4 = y/x

r = √(x² + y²)
r = √(4² + 3²)
r = 5

sin α + tan α = y/r + y/x
sin α + tan α = 3/5 + 3/4
sin α + tan α = 12/20 + 15/20
sin α + tan α = 27/20
sin α + tan α = 1 7/20