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Solve 2 cos 2𝑥° = 1 for 0 ≤ 𝑥 ≤ 180.

 Mar 6, 2017
 #1
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Solve 2 cos 2𝑥° = 1 for 0 ≤ 𝑥 ≤ 180.

 

2cos(2x)=1|:2cos(2x)=12|±arccos()2x=±arccos(12)+360kkZ2x=±60+360k|:2x=±30+180kx1=30x2=30+180x2=150

 

laugh

 Mar 6, 2017

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