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Вычислите cos 90°\cos\ 90\degreecos 90°
22\frac{\sqrt{2}}{2}22
12\frac{1}{2}21
32\frac{\sqrt{3}}{2}23
000
дан острый угол α, найдите tgα, если ctgα = √3
1
√3
2
√2
sin45 °\degree°
cos30
1/2
√3/2
√2/2
tg30
0
√3/3
tg45
cos60
tg60
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