# 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. Please send us an email with your suggestions for this glossary. We at Mr. X want this site to be as helpful as possible.

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