Известно, что [tex]cos(4\pi+t)=\frac{12}{13}, \frac{3 \pi}{2} \ \textless \ t\ \textless \ 2 \pi [/tex]
Вычислите [tex] \frac{6|cost|-|sint|}{cost} [/tex]
Вычислите [tex] \frac{6|cost|-|sint|}{cost} [/tex]
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Cos(4π+t)=cost=12/13sint=-√(1-cos²t)=-√(1-144/169)=-√25/169=-5/13
(6|cost|-|sint|)/cost=(72/13-5/13):12/13=67/13*13/12=67/12=5 7/12