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rodikova [14]
3 years ago
12

Help please. show work

Mathematics
1 answer:
shtirl [24]3 years ago
4 0
Sine law to find angle R

\displaystyle \frac{\sin R}{122}= \frac{\sin 64}{187.5} \\ \\
\sin R =  \frac{122\sin 64}{187.5} \\ \\
R = \sin^{-1} \left[ \frac{122\sin 64}{187.5} \right] \\  \\
R \approx 35.7899447211

All angles in triangle add to 180 so we can find angle P

P = 180 - R - Q
P = 180 - 35.7899447211 - 64
P = 80.2100552789

sine law with angle P to find length of RQ

\displaystyle
\frac{RQ}{\sin P} = \frac{187.5}{\sin 64} \\ \\
RQ = \frac{187.5\sin P}{\sin 64}  \\ \\
RQ = \frac{187.5\sin 80.2100552789}{\sin 64}  \\ \\
RQ = 205.57

or use cosine law

RQ = \sqrt{187.5^2 + 122^2 - 2(187.5)(122) \cos80.2100552789} \\ RQ \approx 205.57

either way the answer is 205.57 feet
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