August 2022 2 41 Report
Упростите


[tex] \frac{1 - sin^{2}a + ctg^{2}a * sin^{2}a }{ cos^{2}a } [/tex]

[tex] \frac{1+ ctg^{2}a }{1+ tg^{2}a } [/tex]

[tex] \frac{ tga }{sina} - \frac{sina}{ctga} [/tex]

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