Can anyone help me with this?

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

Jordan got 27 out of 90 correct on his test . what fraction of the marks did her get correct

Ok a point t on a segment with endpoints d(1, 4) and f(7, 1) partitions the segment in a 2: 1 ratio. find t. you must show all work to receive credit.