1. Perbandingan Trigonometri
Sisi miring \(\theta=\mathrm{mi}\)
Sisi depan \(\theta=\mathrm{de}\)
Sisi samping \(\theta=\mathrm{sa}\)
\(\begin{aligned} & \sin \theta=\frac{\mathrm{de}}{\mathrm{mi}}=\frac{a}{c} \Rightarrow \csc \theta=\frac{1}{\sin \theta} \\ & \cos \theta=\frac{\mathrm{sa}}{\mathrm{mi}}=\frac{b}{c} \Rightarrow \sec \theta=\frac{1}{\cos \theta} \\ & \tan \theta=\frac{\mathrm{de}}{\mathrm{sa}}=\frac{a}{b} \Rightarrow \cot \theta=\frac{1}{\tan \theta}\end{aligned}\)
2. Tabel nilai perbandingan sudut istimewa
3. Rumus identitas trigonometri
\(
\begin{aligned}
& \sin ^2 x+\cos ^2 x=1 \\
& \tan ^2 x+1=\sec ^2 x \\
& 1+\cot ^2 x=\csc ^2 x
\end{aligned}
\)
4. Tanda nilai perbandingan trigonometri berdasarkan kuadran
5. Nilai perbandingan sudut yang berelasi
6. Nilai trigonometri sudut negatif
\(
\begin{aligned}
& \sin (-x)=-\sin x \\
& \cos (-x)=\cos x \\
& \tan (-x)=-\tan x
\end{aligned}
\)
7. Rumus-rumus dalam segitiga
