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[2*(sin²15⁰ + cos²15⁰) -3*tg 30⁰]/2 sin⁰45⁰ =
[2* 1 - 3*(√3/3)]/2*(√2/2) = [2 - √3]/√2 = √2 - √3/√2 = √2 -√6/2
2-pierwiastek z3 kreska ulamkowa pierwiastek z2= 2- pierwiastek z 3 ·pierwiastek z2 kreska ułamkowa 2= - pierwiastek z 6