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siniylev [52]
3 years ago
13

If you could please show all your steps that would be great.

Mathematics
1 answer:
bixtya [17]3 years ago
5 0

a. Angles ABC and CBD are supplementary, so you know that m\angle ABC=180^\circ-24^\circ=156^\circ

The interior angles of any triangle sum to 180 degrees in measure, so that m\angle ACB=180^\circ-156^\circ-16^\circ=8^\circ.

By the law of sines, we then have

\dfrac{\sin8^\circ}{7600\,\mathrm{ft}}=\dfrac{\sin16^\circ}{BC}\implies BC=\dfrac{(7600\,\mathrm{ft})\sin16^\circ}{\sin156^\circ}\approx15052\,\mathrm{ft}

b. In triangle BCD, we have

\sin24^\circ=\dfrac{CD}{BC}

and so

CD=\sin24^\circ\dfrac{(7600\,\mathrm{ft})\sin16^\circ}{\sin8^\circ}\approx6122\,\mathrm{ft}

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