55. I believe is correct
56. I believe is correct
57. This is just 25.2
for your theta you have used 50.194, it is better to use the true outcome = 50.19442891 (8dp) and tan of that = 1.2, x 21 = 25.2
58. I believe is correct
59. I believe is correct
60. I am confused on what you are trying to show on this question, the sin, cos and tan ratios only apply to RIGHT-ANGLED triangles, I cannot see a right-angle specified. A better illustration would help thank you.
PS Don't forget to add in (xd.p.) x = the number of decimal cases u go up to, ie. specify your range (in this case you're going up to 3d.p.)