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Trig Functions: The Functions
The functions are usually abbreviated: sine (sin), cosine (cos), tangent (tan) cosecant (csc), secant (sec), and cotangent (cot). It is often simpler to memorize the the trig functions in terms of only sine and cosine:
The functions are usually abbreviated: arcsine (arcsin) According to the standard notation for inverse functions (f^{1}), you will also often see these written as sin^{1}, cos1^{}, tan^{1} arccsc^{1}, arcsec^{1}, and arccot^{1}. Beware, though, there is another common notation that writes the square of the trig functions, such as (sin(x))^{2} as sin^{2}(x). This can be confusing, for you then might then be lead to think that sin^{1}(x) = (sin(x))^{1}, which is not true. The negative one superscript here is a special notation that denotes inverse functions (not multiplicative inverses). See also: overview. 


