Trigonometry Ch. 8 Practice Test
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question to see the correct answer.
Find the geometric mean.
10 and 50
10 5
Find the missing measures in reduced
radical form.
6
x
5
X = 11
Use the 45-45-90 pattern to solve for x
and y in reduced radical form.
19
x
y
9
y
x
x=9 y=9 2
x=
19 2
2
y=
19 2
2
Use the 30-60-90 pattern to solve for x
and y in reduced radical form.
30
x
60
y
x
30
y
x = 15 y = 15 3
15
x = 5 3 y = 10 3
Find the trig ratio from the picture provided in reduced
fraction form and as a decimal to four decimal places.
Cos A
5
7
= .7143
A
21
15
Tan B
16
15
= 1.0667
Sin A
16
21
= .7619
C
16
B
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
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
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
∠A = 54.9 ∠C = 77.1
∠B = 48
c = 14.3
Use law of cosine to solve for all the
missing parts of the triangle. Round all
measurements to the nearest whole.
a = 19
∠A = 51
b = 23.2
∠B = 72
c = 21
∠C = 57