December 2018 1 91 Report
1.Oblicz
a)(cos45*-cos30*)(cos45*+cos30*)
b)(3sin45*+tg60*)(3sin45*-tg60*)
c)(sin60*+cos30*)^2-(sin30*+cos60*)^2
d)2(tg30*-sin45*)(cos45*-ctg60*)

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