Write the expression in terms of cosine. .

sin(81)

Step-by-step explanation:

Since the sine of something is the ratio of the opposite side to the hypotenuse, to get the same ratio in cosine, you take the complement of the angle. So the answer is sin(90 - 9) or sin(81).

if you use photomath right away it will give you the answer not like this app that you have to wait for people.

both equations and proportions are better.