Answer:
[tex]\cos x=15\div 17[/tex]
Step-by-step explanation:
Recall the mnemonics SOH-CAH-TOA.
The CAH means the cosine ratio is the ratio of the adjacent side to the hypotenuse.
From the given triangle;
[tex]\cos x=\frac{Adjacent}{Hypotenuse}[/tex]
The side adjacent to the [tex]x\degree[/tex] is 15cm and the hypotenuse is 17cm.
We substitute the values to get;
[tex]\cos x=\frac{15}{17}[/tex] or [tex]\cos x=15\div 17[/tex].
