1 / | | ________ | / 2 2 | \/ 1 - t *t dt | / 0
Integral(sqrt(1 - t^2)*t^2, (t, 0, 1))
TrigSubstitutionRule(theta=_theta, func=sin(_theta), rewritten=1/8 - cos(4*_theta)/8, substep=AddRule(substeps=[ConstantRule(constant=1/8, context=1/8, symbol=_theta), ConstantTimesRule(constant=-1/8, other=cos(4*_theta), substep=URule(u_var=_u, u_func=4*_theta, constant=1/4, substep=ConstantTimesRule(constant=1/4, other=cos(_u), substep=TrigRule(func='cos', arg=_u, context=cos(_u), symbol=_u), context=cos(_u), symbol=_u), context=cos(4*_theta), symbol=_theta), context=-cos(4*_theta)/8, symbol=_theta)], context=1/8 - cos(4*_theta)/8, symbol=_theta), restriction=(t > -1) & (t < 1), context=t**2*sqrt(1 - t**2), symbol=t)
Ahora simplificar:
Añadimos la constante de integración:
Respuesta:
/ | | ________ // ________ \ | / 2 2 || / 2 / 2\ | | \/ 1 - t *t dt = C + |-1, t < 1)| / \\ 8 8 /
1 / | | / 2 6 2 4 4 | | 9*I*t I*t I*t 3*I*t 5*I*t 2 | |- -------------- - -------------- - -------------- + -------------- + -------------- for t > 1 | | _________ 3/2 3/2 3/2 _________ | | / 2 / 2\ / 2\ / 2\ / 2 | | 8*\/ -1 + t 4*\-1 + t / 8*\-1 + t / 8*\-1 + t / 4*\/ -1 + t | < dt | | 4 6 2 4 2 | | 5*t t t 3*t 9*t | | - ------------- - ------------- - ------------- + ------------- + ------------- otherwise | | ________ 3/2 3/2 3/2 ________ | | / 2 / 2\ / 2\ / 2\ / 2 | \ 4*\/ 1 - t 4*\1 - t / 8*\1 - t / 8*\1 - t / 8*\/ 1 - t | / 0
=
1 / | | / 2 6 2 4 4 | | 9*I*t I*t I*t 3*I*t 5*I*t 2 | |- -------------- - -------------- - -------------- + -------------- + -------------- for t > 1 | | _________ 3/2 3/2 3/2 _________ | | / 2 / 2\ / 2\ / 2\ / 2 | | 8*\/ -1 + t 4*\-1 + t / 8*\-1 + t / 8*\-1 + t / 4*\/ -1 + t | < dt | | 4 6 2 4 2 | | 5*t t t 3*t 9*t | | - ------------- - ------------- - ------------- + ------------- + ------------- otherwise | | ________ 3/2 3/2 3/2 ________ | | / 2 / 2\ / 2\ / 2\ / 2 | \ 4*\/ 1 - t 4*\1 - t / 8*\1 - t / 8*\1 - t / 8*\/ 1 - t | / 0
Integral(Piecewise((-9*i*t^2/(8*sqrt(-1 + t^2)) - i*t^6/(4*(-1 + t^2)^(3/2)) - i*t^2/(8*(-1 + t^2)^(3/2)) + 3*i*t^4/(8*(-1 + t^2)^(3/2)) + 5*i*t^4/(4*sqrt(-1 + t^2)), t^2 > 1), (-5*t^4/(4*sqrt(1 - t^2)) - t^6/(4*(1 - t^2)^(3/2)) - t^2/(8*(1 - t^2)^(3/2)) + 3*t^4/(8*(1 - t^2)^(3/2)) + 9*t^2/(8*sqrt(1 - t^2)), True)), (t, 0, 1))
Estos ejemplos se pueden aplicar para introducción de los límites de integración inferior y superior.