dx-sin-4-x-cos-4-x-

Question Number 20468 by tammi last updated on 27/Aug/17

\int \frac{d x}{\sin^{4} x - \cos^{4} x}

Answered by ajfour last updated on 27/Aug/17

- \int \sec 2 x d x = - \frac{1}{2} \ln ∣ \sec 2 x + \tan 2 x ∣ + C .

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