What is the equation of an ellipse with a semi-major axis of length a and a semi-minor axis of length b?
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What is the value of arcsin(0.5)?
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Find the value of sinh(cos^-1(4/5)) + cosh(tan^-1(-3/4)), where sinh(x) represents the hyperbolic sine function and cosh(x) denotes the hyperbolic cosine function.