Write the following expression as the sine, cosine, or tangent of a double angle. Then find the exact value of the expression. 2 cos 8 - 1

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section: Chapter Questions
Problem 10RE
Topic Video
Question
Write the following expression as the sine, cosine, or tangent of a double angle. Then find the exact value of the expression.
2 cos 2-1
8.
Write the following expression as the sine, cosine, or tangent of a double angle. Select the correct choice below and fill in the answer box to complete your choice.
(Simplify your answer. Type an exact answer, using x as needed. Use integers or fractions for any numbers in the expression.)
O A. 2 cos
元
2.
-13sin
O B. 2 cos
-13tan
O C. 2 cos
1 cos
Click to select and enter your answer(s) and then click Check Answer.
1
1 part
remaining
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Tyno hore
rearch
天一8
K00
2.
Transcribed Image Text:Write the following expression as the sine, cosine, or tangent of a double angle. Then find the exact value of the expression. 2 cos 2-1 8. Write the following expression as the sine, cosine, or tangent of a double angle. Select the correct choice below and fill in the answer box to complete your choice. (Simplify your answer. Type an exact answer, using x as needed. Use integers or fractions for any numbers in the expression.) O A. 2 cos 元 2. -13sin O B. 2 cos -13tan O C. 2 cos 1 cos Click to select and enter your answer(s) and then click Check Answer. 1 1 part remaining Clear All Tyno hore rearch 天一8 K00 2.
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