X = X1 + X2 = 2[SIN(5 SINT  

Question

4)2.]cos4=> x =  ) (cm)5sin(2 t 4v = x' = 10 2cos(5 )(cm/s)t 4t = 2s ; v = 10 cm/sĐáp án: A

Answer

Đáp án: A 2 . 2 ] cos 4 => x =  ) (cm) 5 sin( 2 2   t 4 v = x' = 10  2 cos(5 ) ( cm / s )   t 4  t = 2s ; v = 10  cm/s Đáp án: A