O valor de
!$ \tan^{10}x – 5\tan^8x \sec^2x + 10\tan^6x \sec^4x– 10\tan^4x \sec^6x + + 5\tan^2x \sec^8x – \sec^{10}x !$, para todo !$ × ∈[0, \large {\pi \over 2}[ !$, é:
O valor de
!$ \tan^{10}x – 5\tan^8x \sec^2x + 10\tan^6x \sec^4x– 10\tan^4x \sec^6x + + 5\tan^2x \sec^8x – \sec^{10}x !$, para todo !$ × ∈[0, \large {\pi \over 2}[ !$, é:
