3 geometry problems that involve table of trigometric ratios. I hope someone can help?

Question

http://tinypic.com/view.php?pic=2cpyl9v&s=2 (Those are the problems)

http://www.themathlab.com/toolbox/geometry%20stuff/trigratios.htm

1) Use the table of trig. ratios to find the m angle A correct to the nearest degree.

2) Use the table of trig. ratios to find the m angle B correct to the nearest degree.

3) Use the table of trig. ratios to find y correct to the nearest integer.

THANKS FOR ANY HELP!

Answer 1

(1) You want the angle who's tangent is 5/10 or 0.5000
Look int the table under tangent for the entry that's closest to 0.5000
That's 0.5095 which corresponds to 27 degrees. So the answer is 27 degrees.

(2) cos B = 3/11 = 0.2727
Look in the table under cosine for the entry that's closest to 0.2727
That's 0.2756 which corresponds to 74 degrees. So the answer is 74 degrees.

(3) cos 40 = y/7
solve for y:
y = 7(cos 40)
Look for cos 40 degrees in the table, that's 0.7660:
y = 7(0.7660) = 5.362 [the nearest integer would be 5]

Answer 2

1. At a time of the day when the shadow of a vertical pole 20 ft. high is 28 ft. long, tree nearby casts a shadow 35 ft. long. How tall is the tree? Ratio and proportion! 20/28 = x/35, right, where x is the height of the tree. Cross multiply, (20/28)*35 = x, simplify (5/7)*35 = x, mult (5*35)/7 = x, cancel 7 5*5 = x, or tree is 25 feet high. Do the rest;they are similar. Start with a drawing.