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ELEN [110]
3 years ago
13

Part A: Suppose Jackson hiked due north on the first trail, and due east on the second trail. Show that the magnitude of the res

ultant vector for the entire hike is . Part B: Describe the meaning of the magnitude you found in Part A in terms of the hike. Part C: Could Jackson have hiked in a different direction on the second trail without affecting the magnitude of the resultant vector? Explain.

Mathematics
1 answer:
kotegsom [21]3 years ago
8 0

Answer:

A) √((distance travelled due north)²+(distance travelled due east)²)

B) distance from starting point

C) Yes due west

Step-by-step explanation:

A) According to pythagoras theorem

resultant vector= √((distance travelled due north)²+(distance travelled due east)²)

Also see 1st attachment

B) The resultant vector tells the distance from the starting point

C) The same amount of distance travelled in opposite direction that is westwards will give same magnitude of resutlant vector.

See 2nd attachment

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What is the exact value of tan 75°?
3241004551 [841]

3.7321

Tan 75 degrees is the value of tangent trigonometric function for an angle equal to 75 degrees. The value of tan 75° is 2 + √3 or 3.7321 (approx).

3 0
2 years ago
Solve for 2/3(9 - 6) + 40<br> and 7/8 - (-1/10) + (-3/5)
masha68 [24]

Answer:

first one is 42

second one is 3/8

Step-by-step explanation:

4 0
3 years ago
A half game in football is 45 min. At one point, a half was extended so that it was 48 minutes 30 seconds long. By what percenta
kozerog [31]

Answer:

8%

Step-by-step explanation:

Multiply the number 45 by at least 1 point 0 something and therefore.  We can assume that a 5% increase is around 47 minutes and 15 seconds and a 10% increase is around 49 minutes and 30 seconds ranging for you to use from 6% to 9%.  The exact answer for the increase is around 7.78%, for me, I would plug in the equation like 45*1.7 and 45*1.8 on the calculator for more accuracy since you would need to round to the full percentage if it's between 7.5% to the exact number, it would be fully rounded to 8% since you would need at least a 5 to round up.

3 0
3 years ago
There are 3 islands A,B,C. Island B is east of island A, 8 miles away. Island C is northeast of A, 5 miles away and northwest of
Nostrana [21]

Answer:

The bearing needed to navigate from island B to island C is approximately 38.213º.

Step-by-step explanation:

The geometrical diagram representing the statement is introduced below as attachment, and from Trigonometry we determine that bearing needed to navigate from island B to C by the Cosine Law:

AC^{2} = AB^{2}+BC^{2}-2\cdot AB\cdot BC\cdot \cos \theta (1)

Where:

AC - The distance from A to C, measured in miles.

AB - The distance from A to B, measured in miles.

BC - The distance from B to C, measured in miles.

\theta - Bearing from island B to island C, measured in sexagesimal degrees.

Then, we clear the bearing angle within the equation:

AC^{2}-AB^{2}-BC^{2}=-2\cdot AB\cdot BC\cdot \cos \theta

\cos \theta = \frac{BC^{2}+AB^{2}-AC^{2}}{2\cdot AB\cdot BC}

\theta = \cos^{-1}\left(\frac{BC^{2}+AB^{2}-AC^{2}}{2\cdot AB\cdot BC} \right) (2)

If we know that BC = 7\,mi, AB = 8\,mi, AC = 5\,mi, then the bearing from island B to island C:

\theta = \cos^{-1}\left[\frac{(7\mi)^{2}+(8\,mi)^{2}-(5\,mi)^{2}}{2\cdot (8\,mi)\cdot (7\,mi)} \right]

\theta \approx 38.213^{\circ}

The bearing needed to navigate from island B to island C is approximately 38.213º.

8 0
3 years ago
Evaluate 18 -8(14 + 4) + 42.
Alina [70]

Answer:

-84

Step-by-step explanation:

4 0
3 years ago
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