1. Find the volume of a cylinder whose base is 9 inches in diameter and whose altitude is 12 inches.
2. Find the following values a. cos 77 degree 3'30" b. sin 18 degree 40'
3. In a right triangle ABC, if the leg a=8 and the leg b=5. what is the angle A tot he nearest seconds?
4. The three sides of a triangle ABC are a=7, b=8 and c=9. Use the law of cosines to find angle B to the nearest minutes.