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Demonstratie ca din 60 grade = 2 sin30 grade × cos 30 grade × tg 30 grade × ctg 30grade=

Răspuns :

sin60g=√3/2
sin30g=1/2
cos30g=√3/2
tgx*ctgx=1 =>tg30g*ctg30g=1
Faci   inlocuirile
√3/2=2*1/2*√3/2=√3/2