Объяснение:
arcsin x = t, - pi/2 <= t <= pi/2
2t² - t - 6 = 0
D = 1 + 8*6 = 49
t = (1 ± 7)/4
t = 2 - не подходит;
t = - 1.5 - подходит!
arcsin x = -1.5
x = - sin(1.5)
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Объяснение:
arcsin x = t, - pi/2 <= t <= pi/2
2t² - t - 6 = 0
D = 1 + 8*6 = 49
t = (1 ± 7)/4
t = 2 - не подходит;
t = - 1.5 - подходит!
arcsin x = -1.5
x = - sin(1.5)