\[\begin{array}{l}\sin N = \frac{{MP}}{{PN}}\\\cos N = \frac{{MN}}{{PN}}\\\tan N = \frac{{MP}}{{MN}}\\\cot N = \frac{{MN}}{{MP}}\end{array}\] Bình luận
\[\begin{array}{l}
\sin N = \frac{{MP}}{{PN}}\\
\cos N = \frac{{MN}}{{PN}}\\
\tan N = \frac{{MP}}{{MN}}\\
\cot N = \frac{{MN}}{{MP}}
\end{array}\]
sinN = MP/NP
cosN = NM/NP
tanN = MP/MN
cotN = NM/MP