$sin(3x-\frac{3\pi }{10})=3sin(x-\frac{\pi }{10})$
Edited by htatgiang, 05-09-2012 - 19:02.
Edited by htatgiang, 05-09-2012 - 19:02.
Đặt $\alpha =x-\frac{\pi }{10}$giải phương trình:
$sin(3x-\frac{3\pi }{10})=3sin(x-\frac{\pi }{10})$
0 members, 1 guests, 0 anonymous users