Question

wyznacz kątwiedząc

Answer 1

1)

2 alfa = p(2)/2  / : 2

alfa = p(2)/4

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2)

2 cos 4 alfa = 1  / : 2

cos 4 alfa = 1/2

4 alfa = pi/3  / : 4

alfa = pi/12

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lub

4 alfa = (5/6) pi    / : 4

alfa = (5/24) pi

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