TRIG RATIOS
SOH · CAH · TOA · LIVE
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Right Triangle Ratios
θ
sin θ = O / H
cos θ = A / H
tan θ = O / A
θ
=
angle
H = 5
hypotenuse (fixed)
sin²θ + cos²θ
1. SOH · CAH · TOA
S
in =
O
pposite /
H
ypotenuse
C
os =
A
djacent /
H
ypotenuse
T
an =
O
pposite /
A
djacent
2. Special Angles
θ
sin
cos
tan
30°
1/2
√3/2
1/√3
45°
1/√2
1/√2
1
60°
√3/2
1/2
√3
3. Remember
tan θ = sin θ / cos θ
sin²θ + cos²θ = 1 (for every angle)
MATRIC MATHS · TRIGONOMETRY · PUNJAB BOARDS
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