Simplificar (1 - secx)(1 + secx)?
Simplificar (1 - secx)(1 + secx).
En resumen
<img src="https://tex.z-dn.net/?
Mejor respuesta
<img src="https://tex.z-dn.net/?f=%281-secx%29%281%2Bsecx%29%3D1%2Bsecx-secx-%20sec%5E%7B2%7Dx%20%3D1-%20sec%5E%7B2%7Dx%3D%20%5C%5C%20%5C%5C%201-%20%5Cfrac%7B1%7D%7Bcos%5E%7B2%7Dx%7D%20%3D%20%5Cfrac%7Bcos%5E%7B2%7Dx-1%7D%7Bcos%5E%7B2%7Dx%7D%20%3D%20%5Cfrac%7B-sen%5E%7B2%7Dx%7D%7Bcos%5E%7B2%7Dx%7D%20%3D%20%5C%5C%20%5C%5C-%20tan%5E%7B2%7Dx" />.