Trigonometric ratios

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Name

Trigonometric ratios
Figure Sides
TR06.png Let the right triangle OHA



O= side adjacent to angle θ



A= side opposite to angle θ


H= hypotenuse



Trigonometric ratios
Name of Ratio Abbreviation Explicit Formula Formula Memory Aid
sine of θ
sinθ
sinθ=side opposite to θhypotenuse
sinθ=OH
SOH
cosine of θ
cosθ
cosθ=side adjacent to θhypotenuse
cosθ=AH
CAH
tangent of θ
tanθ
tanθ=side opposite to θside adjacent to θ
tanθ=OA
TOA
cotangent of θ
cotθ
cotθ=side adjacent to θside opposite to θ
cotθ=AO
secant of θ
secθ
secθ=hypotenuseside adjacent to θ
secθ=HA
cosecant of θ
cscθ
cscθ=hypotenuseside opposite to θ
cscθ=HO



Usage

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See Also

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Icon inter.gif

Web Resources

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