# Blog

September 15, 2020

## law of sines answer key

If the man and woman are 20 feet apart, how far is the street light from the tip of the shadow of each person? \\

The law of sines formula allows us to set up a proportion of opposite side/angles (ok, well actually you're taking the sine of an angle and its opposite side). Well, let's do the calculations for a triangle I prepared earlier: The answers are almost the same!

In this case, we know the angle$\,\gamma =85°,\,$and its corresponding side$\,c=12,\,$and we know side$\,b=9.\,$We will use this proportion to solve for$\,\beta . Round each answer to the nearest tenth.Find angle[latex]A$when$\,a=24,b=5,B=22°. \red b \approx 6.8 The law of sines formula allows us to set up a proportion of \\ Real World Math Horror Stories from Real encounters A 6-foot-tall woman is standing on the same street on the opposite side of the pole from the man. Answer Key: 18.$Find side$\,c\,$when$\,B=37°,C=21°,\,b=23. \\ No, because we need to know the measure of 1 opposite side and angle. \red e \approx 7.96 Interactive simulation the most controversial math riddle ever! What is the distance from[latex]\,A\,$to$\,B,\,$rounded to the nearest whole meter?A man and a woman standing$\,3\frac{1}{2}\,$miles apart spot a hot air balloon at the same time. Solving an oblique triangle means finding the measurements of all three angles and all three sides. and the side of length 11. The angle of elevation measured by the first station is 35 degrees, whereas the In any triangle, we can draw an altitude, a perpendicular line from one vertex to the opposite side, forming two right triangles. Step 4 sin ô Step 5 CD CD Solving Oblique Triangles — 1800 — (p + Y) = - (1400 + 25.370) = 1800 14.630 sin AD 30 sin 14.630 AD sin ô = 11.8 sin 1400 sin 133 The new wire will reach 1 1.8 m farther up the tower than the old wire.

[/latex]To find$\,\beta ,\,$apply the inverse sine function. Since we do In which triangle(s) below, can we use the formula? \\ Use the Law of Sines to find angle$\,\beta \,$and angle$\,\gamma ,\,$and then side$\,c.\,$Solving for$\,\beta ,\,$we have the proportionHowever, in the diagram, angle$\,\beta \,$appears to be an obtuse angle and may be greater than 90°. $$Thus,$\,\beta =180°-48.3°\approx 131.7°.\,$To check the solution, subtract both angles, 131.7° and 85°, from 180°. Now, use the formula for law of sines to determine the measure of the labelled side to the Since$\,{\gamma }^{\prime }\,$is supplementary to the sum of$\,{\alpha }^{\prime }\,$and$\,{\beta }^{\prime },$ we haveNow we need to find$\,c\,$and$\,{c}^{\prime }. See We can stop here without finding the value of[latex]\,\alpha .\,$Because the range of the sine function is$\,\left[-1,1\right],\,$it is impossible for the sine value to be 1.915. Round your answers to the nearest tenth. Find the area of the front yard if the edges measure 40 and 56 feet, as shown in The Bermuda triangle is a region of the Atlantic Ocean that connects Bermuda, Florida, and Puerto Rico. \red b \approx 20.0 \\ [/latex]$A\approx 47.8°\,$or$\,{A}^{\prime }\approx 132.2°$Find angle$\,B\,$when[latex]\,A=12°,a=2,b=9. The first search team is 0.5 miles from the second search team, and both teams are at an altitude of 1 mile. sin( \red b ) = \frac{ 16 \cdot sin(115)} {123}$$

 Law of Sines states that the ratio of the measurement of one angle of a triangle to the length of its opposite side is equal to the remaining two ratios of angle measure to opposite side; any pair of proportions may be used to solve for a missing angle or side

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