Questions 3 and 4: Determine whether or not the given side lengths will form a right triangle.

3. 15, 11, and 2 x square root of 26

a. right triangle

b. not a right triangle

4. square root of 41, 4, and 5

a. right triangle

b. not a right triangle

17. If tan=5/4 calculate the value of cos

a. 5/ square root of 41

b. 4/ square root of 41

c. 5/3

d. 4/3

18. If cos= 2xsquare root of 10/7 calculate the value of sin.

a. 3/7

b. square root of 29/7

c. square root of 69/7

d. square root of 89/7

19. If sin= 1/ square root of 2 find the value of 0.

a. 30º

b. 45º

c. 60º

d. 90º

Questions 20-22: Use a calculator to find the trigonometric value to four decimal places.

20. cos 88º =

a. 0.0354

b. 0.0114

c. 0.9994

d. 0.0349

21. sin 47º =

a. 0.7314

b. 0.6820

c. 0.1236

d. 1.0734

22. tan 8º =

a. 6.7997

b. 0.1405

c. 0.1392

d. 5.6713

26. A riding lawnmower can drive up a 27º incline. In order for a ramp designed to reach a truck bed that is 3 feet above the ground to have a 27º incline, how long should the ramp be?

a. 3.37 ft

b. 5.89 ft

c. 6.61 ft

d. 9 ft