S/RAD20F2 A = A21 A22 2A1A2COS13CMA = A21 A22 2A1A2COS...
Câu 85:
s
/
rad
20
f
2
A =A
2
1
A
2
2
2
A
1
A
2
cos
13
cm
v =
A
2
x
2
m
/
s
s
/
rad
20
f
2
A =A
2
1
A
2
2
2
A
1
A
2
cos
13
cm
v =
A
2
x
2
m
/
s