inverse trigonometric function
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An inverse trigonometric function is a tool that reverses what regular trigonometric functions do—if a trigonometric function takes an angle and gives you a ratio, the inverse function takes a ratio and gives you back the angle. These functions are useful in practical situations like engineering, navigation, and physics where you need to find unknown angles based on known measurements.
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Article
In mathematics, the inverse trigonometric functions (occasionally also called antitrigonometric, cyclometric, or arcus functions) are the inverse functions of the trigonometric functions, under suitably restricted domains. Specifically, they are the inverses of the sine, cosine, tangent, cotangent, secant, and cosecant functions, and are used to obtain an angle from any of the angle's trigonometric ratios. Inverse trigonometric functions are widely used in engineering, navigation, physics, and geometry.
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