What is the answer to numbers 2,3,4,5 and 6

Lets Start with Number 2
10 1/8 + ( 3 5/8 + 2 7/8)
Lets start with the parenthesis
10 1/8 + ( 3 5/8 + 2 7/8)
                     5 ( 12/8) 
                       6 ( 4/8) 
Now we add  10 1/8 + 6 4/8
                                 16 5/8

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.