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sin30+cos30-sin45+cos45

Răspuns :

păi : 1/2+√3/2-√2/2+√2/2
sin30°=1/2
cos30°=√3/2
sin45°=√2/2=1/√2
cos45°=√2/2=1/√2
1/2+√3/2-1/√2+1/√2=1/2+√3/2=(1+√3)/2