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Pearson Algebra 2 Common Core, 2011
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7. Double-Angle and Half-Angle Identities
Entry-Level Assessment
1 Subchapters
1. Expressions, Equations, and Inequalities
p. 1-56
12 Subchapters
2. Functions, Equations, and Graphs
p. 57-130
15 Subchapters
3. Linear Systems
p. 131-190
13 Subchapters
4. Quadratic Functions and Equations
p. 191-276
20 Subchapters
5. Polynomials and Polynomial Functions
p. 277-356
17 Subchapters
6. Radical Functions and Rational Exponents
p. 357-430
16 Subchapters
7. Exponential and Logarithmic Functions
p. 431-494
15 Subchapters
8. Rational Functions
p. 495-560
16 Subchapters
9. Sequences and Series
p. 561-610
13 Subchapters
10. Quadratic Relations and Conic Sections
p. 611-670
14 Subchapters
11. Probability and Statistics
p. 671-760
19 Subchapters
12. Matrices
p. 761-824
14 Subchapters
13. Periodic Functions and Trigonometry
p. 825-900
17 Subchapters
14. Trigonometric Identities and Equations
p. 901-971
14 Subchapters
Skills Handbook
13 Subchapters
Start
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Lesson Check
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6 Solutions
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Practice and Problem-Solving Exercises
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59 Solutions
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Mixed Review
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Exercise
3
Page
955
Page
955
Hint & Answer
Solution
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Geogebra classic
Thinking
support
Hints
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A
a
Use the
Double Angle Identity
for
cosine
.
visibility_off
Show hint for A
B
b
Use the the
Half Angle Identity
for
sine
.
visibility_off
Show hint for B
C
c
Use the Half Angle Identity for cosine.
visibility_off
Show hint for C
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Check the answer
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A
a
- 5/13
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Show answer for A
B
b
sqrt(13-2sqrt(13)/26)
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Show answer for B
C
c
-sqrt(13+2sqrt(13)/26)
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Show answer for C
Practice makes perfect
Practice exercises
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Progress overview
Double and Half-Angle Identities
Level 1 exercises - Double and Half-Angle Identities
Level 2 exercises - Double and Half-Angle Identities
Level 3 exercises - Double and Half-Angle Identities
Subchapter links
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Lesson Check
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Standardized Test Prep
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Mixed Review
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