[size=150]Se denomina función coseno, y se denota [math]f\left(x\right)=cos\left(x\right)[/math], a la aplicación de la razón trigonométrica coseno a una variable independiente x expresada generalmente en radianes.[br][/size][size=150]La función coseno es una función trigonométrica, que es el resultado del cociente entre el cateto adyacente y la 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[/img]
[size=150][i][color=#e06666][b]Dominio:[/b] [/color][/i]Los números reales[br][b][color=#e06666][i]Recorrido: [/i][/color][/b][- 1; 1][br][i][b][color=#e06666]Intersecciones con el eje x: [math]\left(\frac{\pi}{2};0\right)y\left(\frac{3\pi}{2};0\right)[/math][/color][/b][/i][br][i][color=#e06666][b]Intersecciones con el eje y:[/b][/color][/i] (0;1)[br]Es una función continua.[br]La función es simétrica con respecto a la recta, [math]x=0[/math] o con respecto al eje y.[br]No presente asíntotas.[br]No es una función inyectiva.[br]No es una función sobreyectiva.[br][b][i][color=#e06666]Máximo relativo: [/color][/i][/b](0; 1) y (2π; 1)[br][b][i][color=#e06666]Mínimo relativo:[/color][/i][/b] (π;-1)[br]La función [math]f\left(x\right)=cosx[/math] es par, ya que [math]cos(-x)=cosx[/math] para todo x en [math]\mathbb{R}[/math][/size]