Tan = o/a
Tangent of an angle = opposite over adjacent.
Here are the other Trig. functions.
SINe(angle) = opposite/hypotenuse
COSine(angle) = adjacent/hypotenuse
COTangent(angle) = adjacent/opposite
Cosecant(CSC)(angle) = hypotenuse/oppositre
SECant(angle) = hypotenuse/ adjcent.
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The six basic functions of trigonometry are the sine, cosine, tangent, cosecant, secant, and cotangent functions. Abbreviated sin, cos, tan, csc, sec, cot.
tangent of 30 degrees = 1/2 of the square root of 3 = roughly 0.5773
angle can be defined as sin-1=O/H, cos-1=/H, or Tan-1=O/A
tan (30 degrees) would be equal to 0.577350269.
sin^2 (feta) + cos^2 (feta) = 1 sin (feta) / cos (feta) = tan (feta)