Answer:
3.8 cm
Explanation:
You want the length of the side opposite a 39° angle in a right triangle that has a hypotenuse of 6.1 cm.
Sine
The sine relation is ...
Sin = Opposite/Hypotenuse
sin(39°) = y/(6.1 cm)
y = (6.1 cm)·sin(39°) ≈ 3.8 cm
The length y is about 3.8 cm.
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