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3.1: Identidades recíprocas y pitagóreas
https://espanol.libretexts.org/Matematicas/Precalculo_y_Trigonometria/Libro%3A_Trigonometr%C3%ADa_Primaria_(Beveridge)/03%3A_Identidades_trigonom%C3%A9tricas_y_ecuaciones/3.01%3A_Identidades_rec%C3%ADprocas_y_pitag%C3%B3reas
$\frac{\tan \theta-\cot \theta}{\sin \theta \cos \theta}=\sec ^{2} \theta-\csc ^{2} \theta$ \[\frac{\tan \theta}{\sin \theta \cos \theta}-\frac{\cot \theta}{\sin \theta \cos \theta}=\sec ^{2} \theta-... $\frac{\tan \theta-\cot \theta}{\sin \theta \cos \theta}=\sec ^{2} \theta-\csc ^{2} \theta$ $\frac{\tan \theta}{\sin \theta \cos \theta}-\frac{\cot \theta}{\sin \theta \cos \theta}=\sec ^{2} \theta-\csc ^{2} \theta$ $\frac{\frac{\sin \theta}{\cos \theta}}{\sin \theta \cos \theta}-\frac{\frac{\cos \theta}{\sin \theta}}{\sin \theta \cos \theta}=\sec ^{2} \theta-\csc ^{2} \theta$ \[\frac{\sin \theta}{\cos \theta} \cdot \frac{1}{\sin \theta \cos \theta}-\frac{\cos \theta}{\sin \theta} \cdot \fra…

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