TRIGONOMETRY GLOSSARY
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Title  Description  

Arccos  The inverse cosine. Given the number that represents the cosine of an angle, the arccosine of the number returns the angle whose cosine is the given number. 

Arccot  The inverse cotangent. Given the number that represents the cotangent of an angle, the arccotangent of the number returns the angle whose cotangent is the given number. 

Arccsc  The inverse cosecant. Given the number that represents the cosecant of an angle, the arccosecant of the number returns the angle whose cosecant is the given number. 

Arcsec  The inverse secant. Given the number that represents the secant of an angle, the arcsecant of the number returns the angle whose secant is the given number. 

Arcsin  The inverse sine. Given the number that represents the sine of an angle, the arcsine of the number returns the angle whose sine is the given number. 

Arctan  The inverse tangent. Given the number that represents the tangent of an angle, the arctangent of the number returns the angle whose tangent is the given number. 

Argument of a Vector  The angle at which a vector is directed. 

ASTC  Mnemonic device for remembering which trig functions are positive in the four Cartesian quadrants. 
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