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exercitiu trigonometric (cl 12)
dau coroana indata dupa raspunsurile elocvente


Exercitiu Trigonometric Cl 12 Dau Coroana Indata Dupa Raspunsurile Elocvente class=

Răspuns :

tg(π/2-x)=ctgx, deci tg(π/2-arctg1/2)=ctg(arctg1/2)=[tex] \frac{1}{tg(arctg \frac{1}{2}) }= \frac{1}{ \frac{1}{2} }=2 [/tex]