Find the angle between the rays OB and the semiaxis Ox, if B (3; 3)
| September 29, 2021 | education
OA = 3 cm, OS = 3 cm.
Triangle ОАВ is rectangular, then tgАВ = ОВ / ОА = 3/3 = 1.
angle α = arctg1 = 45.
Answer: The angle between the OB and the OX semi-axis is 45.
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