Exercício
$\int_0^{\frac{\pi\:}{8}}\left(\left(cos7x\right)^2sen7x\right)dx$
Solução explicada passo a passo
Resposta final para o problema
$\frac{1-\cos\left(\frac{7\pi }{8}\right)^{3}\cdot \left(\left(\cos\left(\frac{7\pi }{8}\right)^2\right)^2\right)^2\cos\left(\frac{7\pi }{8}\right)\cos\left(\frac{7\pi }{8}\right)\cos\left(\frac{7\pi }{8}\right)\cos\left(\frac{7\pi }{8}\right)\cos\left(\frac{7\pi }{8}\right)\cos\left(\frac{7\pi }{8}\right)\cos\left(\frac{7\pi }{8}\right)\cos\left(\frac{7\pi }{8}\right)\cos\left(\frac{7\pi }{8}\right)\cos\left(\frac{7\pi }{8}\right)\cos\left(\frac{7\pi }{8}\right)\cos\left(\frac{7\pi }{8}\right)\cos\left(\frac{7\pi }{8}\right)\cos\left(\frac{7\pi }{8}\right)\cos\left(\frac{7\pi }{8}\right)\cos\left(\frac{7\pi }{8}\right)+\sin\left(\frac{7\pi }{8}\right)^{2}\cos\left(\frac{7\pi }{8}\right)}{21}$