pAIrmatic Lessons

Right Triangle Trigonometry

Geometry Trigonometry

TrigonometryRight Triangle TrigonometryUnit Circle and Radians Trigonometric Identities Sum, Difference and Double-Angle Formulas Law of Sines and Law of Cosines Sine and Cosine Graphs

The six ratios (SOHCAHTOA)

Sine

\sin θ = \frac{opposite}{hypotenuse}

Cosine

\cos θ = \frac{adjacent}{hypotenuse}

Tangent

\tan θ = \frac{opposite}{adjacent}

Cosecant

\csc θ = \frac{hypotenuse}{opposite}

Secant

\sec θ = \frac{hypotenuse}{adjacent}

Cotangent

\cot θ = \frac{adjacent}{opposite}

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