Triangle $ABC$ is similar to triangle $DEF$, where angle $A$ correspo…

Question

Prompt

Triangle

A B C

is similar to triangle

D E F

, where angle

A

corresponds to angle

D

and angles

C

and

F

are right angle. The length of

A B

2.4

times the length of

D E

. If

tan A = 21/20

, what is the value of

sin D