formula pronta
cos(a/2) = √[(1 + cos(a))/2]
cos(a/2) = √[(1 + 3/5)/2]
cos(a/2) = √(8/10)
pronto
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formula pronta
cos(a/2) = √[(1 + cos(a))/2]
cos(a/2) = √[(1 + 3/5)/2]
cos(a/2) = √(8/10)
pronto