Trig Functions

Study Guide: The 6 Trigonometric Functions

  1. Sine (sin) y

    • Definition: Opposite side divided by hypotenuse in a right triangle.

    • opp/hyp

  2. Cosine (cos) x

    • Definition: Adjacent side divided by hypotenuse in a right triangle.

    • adj/hyp

  3. Tangent (tan) y/x

    • Definition: Opposite side divided by adjacent side in a right triangle.

    • opp/adj

  4. Cosecant (csc) 1/y

    • Definition: Reciprocal of sine.

    • hyp/opp

  5. Secant (sec) 1/x

    • Definition: Reciprocal of cosine.

    • hyp/adj

  6. Cotangent (cot) x/y

    • Definition: Reciprocal of tangent.

    • adj/opp

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