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jenniferlynn jenniferlynn
  • 01-06-2016
  • Physics
Answered

Enter the expression 2cos2(θ)−1, where θ is the lowercase Greek letter theta.

Verified Answer :

Hussain514 Hussain514
  • 09-06-2016

2cos2(θ)−1 = 0
2cos2(θ)=1
cos2(θ)=1/2
2θ=arc cos1/2
2θ=60 degrees
θ=30 degrees

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