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Use tan ⁡x=2, where 180° < x < 270°, to answer the following questions. Part A: What formulas(s) can be used to find cos⁡(2x)? Part B: What is cos⁡(2x)?
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Use tan ⁡x=2, where 180° < x < 270°, to answer the following questions.

Part A: What formulas(s) can be used to find cos⁡(2x)?

Part B: What is cos⁡(2x)?

User Daniel Albuschat
by
7.6k points

2 Answers

0 votes

Answer:

A: 2cos2x−1

A: 1−2sin2x

A: cos2x−sin2x

B: 0

Explanation:

User Lxgr
by
8.3k points
3 votes

Answer:

A = 3/5

B = 3/5

Explanation:

User Drott
by
7.5k points
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