You Do Need power plug adapter while traveling from Tajikistan to Bangladesh.

Here is Why You Need An Adapter

The outlet and plug type used in Bangladesh are A, C, D, G and K and in Tajikistan are C and F. This is how they look like.

Tajikistan

In Tajikistan, outlets of type C and F are in use.

Type C

Type F

Bangladesh

In Bangladesh, outlets of type A, C, D, G and K are in use.

Type A

Type C

Type D

Type G

Type K