1. Trigonometry Ch. 8 Practice Test
Click the mouse after you try each question to see the correct answer.

2. Find the geometric mean.
10 and

3. Find the missing measures in reduced radical form.
X = 11 6 x 5

4. Use the 45-45-90 pattern to solve for x and y in reduced radical form.
x = 9 y = 9 2 x = y = 19 y x 9 y x

5. Use the 30-60-90 pattern to solve for x and y in reduced radical form.
x = 15 y = x = y = 10 3 60 y 30 x x 30 y 15

6. Find the trig ratio from the picture provided in reduced fraction form and as a decimal to four decimal places.
Cos A 5 7 = Tan B = Sin A = .7619 A 21 15 C 16 B

7. From an airplane, Janara looked down to see a city
From an airplane, Janara looked down to see a city. If she looked down at an angle of 9 degrees and the airplane was half a mile above the ground, what was the horizontal distance to the city?
3.2 miles

8. A section of freeway has a steady incline of 10 degrees
A section of freeway has a steady incline of 10 degrees. If the horizontal from the beginning of the incline to the end is 5 miles, how high does the incline reach?
.9 miles

9. Use law of sine to solve for all the missing pieces of the triangle
Use law of sine to solve for all the missing pieces of the triangle. Round all measurements to the nearest tenth.
a = 12.2 b = 10.9 ∠B = 48 ∠A = 54.9 ∠C = 77.1 c = 14.3

10. Use law of cosine to solve for all the missing parts of the triangle
Use law of cosine to solve for all the missing parts of the triangle. Round all measurements to the nearest whole.
a = 19 b = 23.2 c = 21 ∠A = 51 ∠B = 72 ∠C = 57