Question
Asked Oct 2, 2019
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Use trigonometric identities to solve cos(2θ)−cos(θ)=0 exactly for 0∘≤θ<360∘

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Expert Answer

Step 1

Given equation,

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cos20 cose 0 To solve for 0, Note: cos20 2cos20 1

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Step 2

Solving,...

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2cos20 1 cose = 0 2cos20 2cos0cos0 - 1 = 0 (2cose 1)cos0 1) 0

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