August 2022 1 11 Report
Решите пожалуйста(тема тригонометрические функции):
Упростить выражение:
1. [tex] ctg^{2} t-( sin^{-2} t-1)[/tex]
2. [tex] \frac{cost}{1+sint}+ \frac{cost}{1-sint} [/tex]
Доказать тождество:
3. [tex] \frac{tgt}{tgt+ctgt} = sin^{2} t[/tex]
4. [tex] \frac{1+tgt}{1+ctgt} =tgt[/tex]
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