Keiko sewed 3/4 yard of lace on her backpack. pam sewed 1/4 yard of lace on her backpack. how much more lace did keiko sew on her backpack than pam?

2/4 or 1/2 yards more of lace

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.