Which of the following can be used to calculate the height of the river dam?
$\frac{115}{\cos 50^{\circ}}$
$115 \cos 50^{\circ}$
$115 \tan 50^{\circ}$
$\frac{115}{\sin 50^{\circ}}$

Answer

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Answer

\boxed{\text{Final Answer: } \frac{115}{\sin 50^\circ}}

Steps

Step 1 ：Calculate the height using the sine function: height = distance * sin(angle)

Step 2 ：Substitute the given values: height = 115 * sin(50°)

Step 3 ：Simplify the expression: height = $\frac{115}{\sin 50^\circ}$

Step 4 ：\boxed{\text{Final Answer: } \frac{115}{\sin 50^\circ}}