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Trig Section 2.1

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

Right triangle mc001-1.jpg has mc001-2.jpg, a = 6, and b = mc001-3.jpg. Use this information to find mc001-4.jpg.
a.
mc001-5.jpg
b.
mc001-6.jpg
c.
mc001-7.jpg
d.
mc001-8.jpg
e.
mc001-9.jpg
 

 2. 

Find cos A in the right triangle below.

mc002-1.jpg
a.
mc002-2.jpg
b.
mc002-3.jpg
c.
mc002-4.jpg
d.
mc002-5.jpg
e.
mc002-6.jpg
 

 3. 

Use the Cofunction Theorem to fill in the blank so that the expression becomes a true statement.

mc003-1.jpg_____ mc003-2.jpg
a.
mc003-3.jpg
b.
mc003-4.jpg
c.
mc003-5.jpg
d.
mc003-6.jpg
e.
mc003-7.jpg
 

 4. 

Use the Cofunction Theorem to fill in the blank so that the expression becomes a true statement.

mc004-1.jpg_____
a.
mc004-2.jpg
b.
mc004-3.jpg
c.
mc004-4.jpg
d.
mc004-5.jpg
e.
mc004-6.jpg
 

 5. 

Simplify the following expression by first substituting values from the table of exact values and then simplifying the resulting expression.

mc005-1.jpg

Table of Exact Values

xsin xcos x
mc005-2.jpg01
mc005-3.jpgmc005-4.jpgmc005-5.jpg
mc005-6.jpgmc005-7.jpgmc005-8.jpg
mc005-9.jpgmc005-10.jpgmc005-11.jpg
mc005-12.jpg10
a.
7
b.
3
c.
8
d.
10
e.
5
 

 6. 

Simplify the following expression by first substituting values from the table of exact values and then simplifying the resulting expression.

mc006-1.jpg

Table of Exact Values

xsin xcos x
mc006-2.jpg01
mc006-3.jpgmc006-4.jpgmc006-5.jpg
mc006-6.jpgmc006-7.jpgmc006-8.jpg
mc006-9.jpgmc006-10.jpgmc006-11.jpg
mc006-12.jpg10
a.
mc006-13.jpg
b.
mc006-14.jpg
c.
1
d.
0
e.
mc006-15.jpg
 

 7. 

Simplify the following expression by first substituting values from the table of exact values and then simplifying the resulting expression.

mc007-1.jpg

Table of Exact Values

xsin xcos x
mc007-2.jpg01
mc007-3.jpgmc007-4.jpgmc007-5.jpg
mc007-6.jpgmc007-7.jpgmc007-8.jpg
mc007-9.jpgmc007-10.jpgmc007-11.jpg
mc007-12.jpg10
a.
mc007-13.jpg
b.
12
c.
mc007-14.jpg
d.
mc007-15.jpg
e.
1
 

 8. 

Find the exact value for mc008-1.jpg.
a.
mc008-2.jpg
b.
0
c.
mc008-3.jpg
d.
mc008-4.jpg
e.
mc008-5.jpg
 

 9. 

There is a right triangle ABC with mc009-1.jpg, b = 8.68, and c = 10.12. Use a calculator to find cos A. Round your answer to the nearest hundredth.
a.
0.86
b.
0.87
c.
0.50
d.
0.51
e.
0.49
 

 10. 

Suppose each edge of the cube shown in the figure is 4 inches long. Find the sine and cosine of the angle formed by diagonals GB and GD.

mc010-1.jpg
a.
mc010-2.jpg
b.
mc010-3.jpg
c.
mc010-4.jpg
d.
mc010-5.jpg
e.
mc010-6.jpg
 



 
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