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Demostrar.
Sec⁴x - Sec²x = tan⁴x + tan²x Factorizas sacas factor comun sec²x
sec²x(sec²x - 1) = tan⁴x + tan²x Pero sec²x - 1 = tan²x por identidad
fundamental
sec²x. tan²x =tan⁴x + tan⁴x Pero sec²x = tan²x + 1 Por identidad
fundamental
(tan²x + 1)tan²x = tan⁴x + tan²x
tan⁴x + tan²x = Tan⁴x + tan²x
sec^2(sec^2-1)=tan^2(tan^2+1)
sec^2.tan^2=tan^2.sec^2