Trigonometric Half Angle Identities

Question 1

Which of these expressions is the simplified form of the expression ?

Revolt · Accepted Answer

Answer image: //media.edgenuity.com/EVresources/1d85ab755b17741473229fa1d29de726.png

Question 2

cos x ✔ 1 + cos x1 - cos x

Revolt · Accepted Answer

✔ 1 + cos x

Question 3

cos x 1 + cos x ✔ 1 - cos x

Revolt · Accepted Answer

✔ 1 - cos x

Question 4

Analyze the proof. Use the drop-down boxes to complete the sentences.

Revolt · Accepted Answer

✔ power reducing; The third line of this proof is known as the . identity of cosine. The justification for the fourth line is .: power reducing; The third line of this proof is known as the . identity of cosine. The justification for the fourth line is .: substitution

Question 5

cancelation ✔ substitutioncombination

Revolt · Accepted Answer

✔ substitution

Question 6

Select the place in which an error first occurs in the proof of .

Revolt · Accepted Answer

Statement 2

Question 7

What are the solutions on the interval 0° ≤ x < 360°?

Revolt · Accepted Answer

120; 180

Question 8

What is the exact value of sin⁡(157.5°)?

Revolt · Accepted Answer

Answer image: //media.edgenuity.com/EVresources/3cedfc17fe4b6cb35473e7236454c474.png

Question 9

What is the exact value of ?

Revolt · Accepted Answer

Answer image: //media.edgenuity.com/EVresources/aa42bf051ac0f519e2f09fbb09041aa1.png

Question 10

the square root is negative ✔ the cosine expressions are reversedcosine 330 degrees is one half

Revolt · Accepted Answer

✔ the cosine expressions are reversed

Trigonometric Half Angle Identities Answers

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