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**Trigonometry Ch. 8 Practice Test**

Click the mouse after you try each question to see the correct answer.

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**Find the geometric mean.**

10 and

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**Find the missing measures in reduced radical form.**

X = 11 6 x 5

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**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

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**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

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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

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**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

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**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

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**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

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**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

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