Answer:
Cosine
Step-by-step explanation:
We have to fill the given blank space .
We know that
[tex]sin\theta=\frac{Opposite\;side}{Hypotenuse}[/tex]
[tex]cos\theta=\frac{Adjacent\;side}{Hypotenuse}[/tex]
[tex]Tan\theta=\frac{Opposite\;side}{adjacent\;side}[/tex]
Therefore, the cosine of an angle is the ratio of the adjacent leg length to the hypotenuse length.
Answer: Cosine
