May 2021 3 154 Report
Matemática 2° ano me ajudem !!?

Como calcular, qual a fórmula, cmo começa a fazer isso :

a) cos 135°

b) sen 210°

c) tg 765°

d) sen (-840)

5- Sendo cosɖ=1/4, com 0<a<t/2, determine sec ɖ

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