0:00:00.910,0:00:03.770
Bine ai venit la lectia noastra despre grade si radiani

0:00:03.770,0:00:07.010
probabil ca deja stiti

0:00:07.010,0:00:07.950
conceptul de grad

0:00:07.950,0:00:10.310
In exemplele noastre veti trece

0:00:10.310,0:00:12.370
printr-o suita de probleme

0:00:12.370,0:00:23.460
Probabil ca stii deja ca un unghi drept are 90 de grade.

0:00:23.460,0:00:28.650
sau ca jumatatea unuil unghi drept are 45 de grade

0:00:28.650,0:00:32.630
Si probabil ca stii deja ca

0:00:32.630,0:00:36.610
intr-un cerc - si cam asa arata un cerc -

0:00:36.610,0:00:38.760
desenat de mine

0:00:38.760,0:00:41.010
Un cerc are 360 de grade

0:00:41.010,0:00:44.750
Astazi va voi prezenta o noua unuitate de masura

0:00:44.750,0:00:47.270
pentru unghiuri. Se numeste Radian

0:00:52.160,0:00:53.450
Deci, ce este un radian?

0:00:53.450,0:00:55.650
Voi incepe cu definitia

0:00:55.650,0:00:57.105
ca sa va dati seama intuitiv de ce se cheama radian

0:01:01.380,0:01:02.850
De data asta voi folosi o aplicatie care sa ma ajute sa desenez un cerc adevarat.

0:01:10.060,0:01:14.270
Inca folosesc aplicatia radian, cerc

0:01:14.270,0:01:14.530
ok