\( y=\sinh (x) \)
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Bonus Knowledge
The hyperbolic sine function \( \sinh(x) \) is derived from the exponential function and can be expressed as \( \sinh(x) = \frac{e^x - e^{-x}}{2} \). This function has fascinating properties, such as being odd (i.e., \( \sinh(-x) = -\sinh(x) \)) and exhibiting rapid growth as \( x \) increases. It is commonly used in physics, particularly in the study of wave functions and the behavior of certain types of differential equations. You can encounter \( \sinh(x) \) in real-world applications like calculating the shape of hanging cables (catenaries). When engineers need to determine the loads and stress on structures, they often use the hyperbolic functions to represent these real-life scenarios mathematically. So, whether you're swinging on a playground swing or admiring the Golden Gate Bridge, hyperbolic sine is quietly playing a role in understanding the physics of everyday structures!