So basically im stuck and i really need help

Find the value of the cosine for angle a

An episode of a television show is 60 minutes long when it originally airs with commercials. on a dvd without commercials, the episode is only 417 minutes long. how many1-minute commercials did the episode include when it originally aired? write and solve an equation to justify your answer.

Find the missing dimension! need asap! tiny square is a =3025 in ²