3 years ago

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

1 answer:

4 0

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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