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Simplifying cosh(x) * cos(x) = -1 Multiply chos * x chosx * cos * x = -1 Multiply chosx * cos c^{2}ho^{2}s^{2}x * x = -1 Multiply c^{2}ho^{2}s^{2}x * x c^{2}ho^{2}s^{2}x^{2}= -1 Solving c^{2}ho^{2}s^{2}x^{2}= -1 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Divide each side by 'ho^{2}s^{2}x^{2}'. c^{2}= -1h^{-1}o^{-2}s^{-2}x^{-2}Simplifying c^{2}= -1h^{-1}o^{-2}s^{-2}x^{-2}Combine like terms: -1h^{-1}o^{-2}s^{-2}x^{-2}+ h^{-1}o^{-2}s^{-2}x^{-2}= 0 c^{2}+ h^{-1}o^{-2}s^{-2}x^{-2}= 0 The solution to this equation could not be determined.

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