2cos2+cos2(2)−2cos2cos2=1

Yserbius asked Dec 24, 2022

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Yserbius asked Dec 24, 2022

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9 votes

The left side
1.99999925
1.99999925
does not equal to the right side
1
1
, which means that the given statement is false.

Hijinxbassist answered Dec 30, 2022

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