What is it called when a columns filled with pairs of numbers that have the same ratio?

Then why is the question on here if you know the answer

Hello! i hope this
since the cosine is the ratio of the adjacent side to the hypotenuse, you can see that cos 60° = ½. answer. according to the property of cofunctions (topic 3), sin 30° is equal to cos 60°. sin 30° = ½.