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In triangle ABC, the measure of angleB i...

In triangle ABC, the measure of `angleB` is `90^(@)`, BC = 16, and AC = 20. Triangle DEF is similar to triangle ABC, where vertices D, E, and F correspond to vertices A, B, and C, respectively, and each side of triangle DEF is `1/3` the length of the corresponding side of triangle ABC. What is the value of sin F ?

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