Sine, Cosine, and Tangent Ratios (Leaving Cert Mathematics): Quizzes

Sides and angles

Longest side opposite the right angle

$\frac{\text{opposite}}{\text{hypotenuse}}$

$\frac{\text{adjacent}}{\text{hypotenuse}}$

$\frac{\text{opposite}}{\text{adjacent}}$

Sine = Opposite over Hypotenuse

Tangent = Opposite over Adjacent

3-4-5

$\sin^2 A + \cos^2 A = 1$

Any angle

$\frac{16}{25}$

Cosine = Adjacent over Hypotenuse