Answer:
The exact answer is 26.986270816
Explanation:
Sin(39) * 28 = 26.986270816
27 cm
This is a right triangle so we can use trig functions.
sin theta = opposite/ hypotenuse
sin 39 = a/28
Multiply each side by 28
28 sin 39 = a
26.98627082
Rounding
a = 27
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