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f=cos^4t la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
       4   
f = cos (t)
$$f = \cos^{4}{\left(t \right)}$$
Gráfica
Suma y producto de raíces [src]
suma
pi       /     /4 ___\\     /     /4 ___\\   3*pi       /     /4 ___\\     /     /4 ___\\   pi     /     /4 ___\\       /     /4 ___\\       /     /4 ___\\   3*pi       /     /4 ___\\       /    / 4 ___\\              /    / 4 ___\\       /    /4 ___\\              /    /4 ___\\       /    / 4 ___\\     /    / 4 ___\\       /    /4 ___\\     /    /4 ___\\
-- - I*re\asinh\\/ f // + im\asinh\\/ f // + ---- - I*re\asinh\\/ f // + im\asinh\\/ f // + -- - im\asinh\\/ f // + I*re\asinh\\/ f // + - im\asinh\\/ f // + ---- + I*re\asinh\\/ f // + - re\acos\-\/ f // + 2*pi - I*im\acos\-\/ f // + - re\acos\\/ f // + 2*pi - I*im\acos\\/ f // + I*im\acos\-\/ f // + re\acos\-\/ f // + I*im\acos\\/ f // + re\acos\\/ f //
2                                             2                                             2                                                                  2                                                                                                                                                                                                     
$$\left(\left(\left(\left(\left(\left(\left(- i \operatorname{re}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} + \operatorname{im}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} + \frac{\pi}{2}\right) + \left(- i \operatorname{re}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} + \operatorname{im}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} + \frac{3 \pi}{2}\right)\right) + \left(i \operatorname{re}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} - \operatorname{im}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} + \frac{\pi}{2}\right)\right) + \left(i \operatorname{re}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} - \operatorname{im}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} + \frac{3 \pi}{2}\right)\right) + \left(- \operatorname{re}{\left(\operatorname{acos}{\left(- \sqrt[4]{f} \right)}\right)} - i \operatorname{im}{\left(\operatorname{acos}{\left(- \sqrt[4]{f} \right)}\right)} + 2 \pi\right)\right) + \left(- \operatorname{re}{\left(\operatorname{acos}{\left(\sqrt[4]{f} \right)}\right)} - i \operatorname{im}{\left(\operatorname{acos}{\left(\sqrt[4]{f} \right)}\right)} + 2 \pi\right)\right) + \left(\operatorname{re}{\left(\operatorname{acos}{\left(- \sqrt[4]{f} \right)}\right)} + i \operatorname{im}{\left(\operatorname{acos}{\left(- \sqrt[4]{f} \right)}\right)}\right)\right) + \left(\operatorname{re}{\left(\operatorname{acos}{\left(\sqrt[4]{f} \right)}\right)} + i \operatorname{im}{\left(\operatorname{acos}{\left(\sqrt[4]{f} \right)}\right)}\right)$$
=
8*pi
$$8 \pi$$
producto
/pi       /     /4 ___\\     /     /4 ___\\\ /3*pi       /     /4 ___\\     /     /4 ___\\\ /pi     /     /4 ___\\       /     /4 ___\\\ /    /     /4 ___\\   3*pi       /     /4 ___\\\ /    /    / 4 ___\\              /    / 4 ___\\\ /    /    /4 ___\\              /    /4 ___\\\ /    /    / 4 ___\\     /    / 4 ___\\\ /    /    /4 ___\\     /    /4 ___\\\
|-- - I*re\asinh\\/ f // + im\asinh\\/ f //|*|---- - I*re\asinh\\/ f // + im\asinh\\/ f //|*|-- - im\asinh\\/ f // + I*re\asinh\\/ f //|*|- im\asinh\\/ f // + ---- + I*re\asinh\\/ f //|*\- re\acos\-\/ f // + 2*pi - I*im\acos\-\/ f ///*\- re\acos\\/ f // + 2*pi - I*im\acos\\/ f ///*\I*im\acos\-\/ f // + re\acos\-\/ f ///*\I*im\acos\\/ f // + re\acos\\/ f ///
\2                                         / \ 2                                          / \2                                         / \                      2                       /                                                                                                                                                                              
$$\left(- i \operatorname{re}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} + \operatorname{im}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} + \frac{\pi}{2}\right) \left(- i \operatorname{re}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} + \operatorname{im}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} + \frac{3 \pi}{2}\right) \left(i \operatorname{re}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} - \operatorname{im}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} + \frac{\pi}{2}\right) \left(i \operatorname{re}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} - \operatorname{im}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} + \frac{3 \pi}{2}\right) \left(- \operatorname{re}{\left(\operatorname{acos}{\left(- \sqrt[4]{f} \right)}\right)} - i \operatorname{im}{\left(\operatorname{acos}{\left(- \sqrt[4]{f} \right)}\right)} + 2 \pi\right) \left(- \operatorname{re}{\left(\operatorname{acos}{\left(\sqrt[4]{f} \right)}\right)} - i \operatorname{im}{\left(\operatorname{acos}{\left(\sqrt[4]{f} \right)}\right)} + 2 \pi\right) \left(\operatorname{re}{\left(\operatorname{acos}{\left(- \sqrt[4]{f} \right)}\right)} + i \operatorname{im}{\left(\operatorname{acos}{\left(- \sqrt[4]{f} \right)}\right)}\right) \left(\operatorname{re}{\left(\operatorname{acos}{\left(\sqrt[4]{f} \right)}\right)} + i \operatorname{im}{\left(\operatorname{acos}{\left(\sqrt[4]{f} \right)}\right)}\right)$$
=
/    /    /4 ___\\     /    /4 ___\\\ /    /    / 4 ___\\     /    / 4 ___\\\ /         /     /4 ___\\         /     /4 ___\\\ /         /     /4 ___\\         /     /4 ___\\\ /            /    /4 ___\\     /    /4 ___\\\ /            /    / 4 ___\\     /    / 4 ___\\\ /      /     /4 ___\\                /     /4 ___\\\ /    /     /4 ___\\                /     /4 ___\\\
\I*im\acos\\/ f // + re\acos\\/ f ///*\I*im\acos\-\/ f // + re\acos\-\/ f ///*\pi - 2*im\asinh\\/ f // + 2*I*re\asinh\\/ f ///*\pi + 2*im\asinh\\/ f // - 2*I*re\asinh\\/ f ///*\-2*pi + I*im\acos\\/ f // + re\acos\\/ f ///*\-2*pi + I*im\acos\-\/ f // + re\acos\-\/ f ///*\- 2*im\asinh\\/ f // + 3*pi + 2*I*re\asinh\\/ f ///*\2*im\asinh\\/ f // + 3*pi - 2*I*re\asinh\\/ f ///
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$$\frac{\left(\operatorname{re}{\left(\operatorname{acos}{\left(- \sqrt[4]{f} \right)}\right)} + i \operatorname{im}{\left(\operatorname{acos}{\left(- \sqrt[4]{f} \right)}\right)}\right) \left(\operatorname{re}{\left(\operatorname{acos}{\left(\sqrt[4]{f} \right)}\right)} + i \operatorname{im}{\left(\operatorname{acos}{\left(\sqrt[4]{f} \right)}\right)}\right) \left(- 2 i \operatorname{re}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} + 2 \operatorname{im}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} + \pi\right) \left(- 2 i \operatorname{re}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} + 2 \operatorname{im}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} + 3 \pi\right) \left(2 i \operatorname{re}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} - 2 \operatorname{im}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} + \pi\right) \left(2 i \operatorname{re}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} - 2 \operatorname{im}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} + 3 \pi\right) \left(\operatorname{re}{\left(\operatorname{acos}{\left(- \sqrt[4]{f} \right)}\right)} + i \operatorname{im}{\left(\operatorname{acos}{\left(- \sqrt[4]{f} \right)}\right)} - 2 \pi\right) \left(\operatorname{re}{\left(\operatorname{acos}{\left(\sqrt[4]{f} \right)}\right)} + i \operatorname{im}{\left(\operatorname{acos}{\left(\sqrt[4]{f} \right)}\right)} - 2 \pi\right)}{16}$$
(i*im(acos(f^(1/4))) + re(acos(f^(1/4))))*(i*im(acos(-f^(1/4))) + re(acos(-f^(1/4))))*(pi - 2*im(asinh(f^(1/4))) + 2*i*re(asinh(f^(1/4))))*(pi + 2*im(asinh(f^(1/4))) - 2*i*re(asinh(f^(1/4))))*(-2*pi + i*im(acos(f^(1/4))) + re(acos(f^(1/4))))*(-2*pi + i*im(acos(-f^(1/4))) + re(acos(-f^(1/4))))*(-2*im(asinh(f^(1/4))) + 3*pi + 2*i*re(asinh(f^(1/4))))*(2*im(asinh(f^(1/4))) + 3*pi - 2*i*re(asinh(f^(1/4))))/16
Respuesta rápida [src]
     pi       /     /4 ___\\     /     /4 ___\\
t1 = -- - I*re\asinh\\/ f // + im\asinh\\/ f //
     2                                         
$$t_{1} = - i \operatorname{re}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} + \operatorname{im}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} + \frac{\pi}{2}$$
     3*pi       /     /4 ___\\     /     /4 ___\\
t2 = ---- - I*re\asinh\\/ f // + im\asinh\\/ f //
      2                                          
$$t_{2} = - i \operatorname{re}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} + \operatorname{im}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} + \frac{3 \pi}{2}$$
     pi     /     /4 ___\\       /     /4 ___\\
t3 = -- - im\asinh\\/ f // + I*re\asinh\\/ f //
     2                                         
$$t_{3} = i \operatorname{re}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} - \operatorname{im}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} + \frac{\pi}{2}$$
         /     /4 ___\\   3*pi       /     /4 ___\\
t4 = - im\asinh\\/ f // + ---- + I*re\asinh\\/ f //
                           2                       
$$t_{4} = i \operatorname{re}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} - \operatorname{im}{\left(\operatorname{asinh}{\left(\sqrt[4]{f} \right)}\right)} + \frac{3 \pi}{2}$$
         /    / 4 ___\\              /    / 4 ___\\
t5 = - re\acos\-\/ f // + 2*pi - I*im\acos\-\/ f //
$$t_{5} = - \operatorname{re}{\left(\operatorname{acos}{\left(- \sqrt[4]{f} \right)}\right)} - i \operatorname{im}{\left(\operatorname{acos}{\left(- \sqrt[4]{f} \right)}\right)} + 2 \pi$$
         /    /4 ___\\              /    /4 ___\\
t6 = - re\acos\\/ f // + 2*pi - I*im\acos\\/ f //
$$t_{6} = - \operatorname{re}{\left(\operatorname{acos}{\left(\sqrt[4]{f} \right)}\right)} - i \operatorname{im}{\left(\operatorname{acos}{\left(\sqrt[4]{f} \right)}\right)} + 2 \pi$$
         /    / 4 ___\\     /    / 4 ___\\
t7 = I*im\acos\-\/ f // + re\acos\-\/ f //
$$t_{7} = \operatorname{re}{\left(\operatorname{acos}{\left(- \sqrt[4]{f} \right)}\right)} + i \operatorname{im}{\left(\operatorname{acos}{\left(- \sqrt[4]{f} \right)}\right)}$$
         /    /4 ___\\     /    /4 ___\\
t8 = I*im\acos\\/ f // + re\acos\\/ f //
$$t_{8} = \operatorname{re}{\left(\operatorname{acos}{\left(\sqrt[4]{f} \right)}\right)} + i \operatorname{im}{\left(\operatorname{acos}{\left(\sqrt[4]{f} \right)}\right)}$$
t8 = re(acos(f^(1/4))) + i*im(acos(f^(1/4)))