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law of sine

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33 articles trouvés pour ce sujet.
A triangular garden 2020-05-24
yoonji pose la question :
the 3 sides of a triangular garden measure 200 ft., 250 ft., and 300 ft., respectively. the garden is to be divided by a line bisecting the longest side and drawn from the opposite vertex. what is the length of the bisecting line?
Penny Nom lui répond.
An angle i a triangle 2020-05-16
Ogunjobi pose la question :
Two goal post are 8m apart a footballer is 34 m from one post and 38m from the other within what angle must he kick the ball if he is to score
Penny Nom lui répond.
A triangular chicken pen 2014-04-27
Cierra pose la question :
Margaret has two lengths of fence, 20 meters and 24 meters, for two sides of a triangular chicken pen. The third side will be on the north side of the barn. One fence length makes a 75° angle with the barn. How many different pens can she build if one fence is attached at the corner of the barn? What are all the possible lengths for the barn side of the pen?

Not sure what they are asking here... please show step by step what to do! Thank you so much!

Penny Nom lui répond.
The sides of a triangle 2014-04-06
Michael pose la question :
I am supposed to sove for the length of side "b" of an irregular triangle. I am given the following:
Side a: 65'
Side b: Find this length
Side c: 50'
Angle A: unknown
Angle B: unknown
Angle C: 52 degrees
I am supposed to use the law of cosines to solve for side "b" and my teacher says there is no mistake in the "givens" for the problem. I do not see how this can be done using the law of cosines and i have not figured out how to sove for angle B to use the law of cosines.

Penny Nom lui répond.
A triangle problem 2013-10-02
raneem pose la question :
ABC is a triangle in which : BC=20cm. M(<B) =29 and m(<C)=73 . D is the midpoint of BC Find the length Of AB and AD approximated to 2 decimal places
Penny Nom lui répond.
The fourth side of an irregular polygon 2013-02-01
Emran pose la question :
I have a irregular polygon. I know 3 of the 4 sides, and 2 of the angles. A-B is 285, B-C is 149, and C-D is 310. Angle B is 135 degrees. and Angle C is 45 degrees. Is there a formula to solve for the final side? Thanks.
Penny Nom lui répond.
How far must the pitcher travel to get to the ball? 2010-11-04
ken pose la question :
A baseball player bunts a ball down the first base line. It rolls 35ft at an angle of 26 degrees with the first base path. The pitchers mound is 60.5 ft from the plate. How far must he travel to get to the ball.
Penny Nom lui répond.
A building and a flag pole 2010-09-09
paul pose la question :
A flag pole and a building stand on the same horizontal level. From the point p at the bottom of the building,the angle of elevation of the top t of the flag pole is 65 degrees. From the top q of the building the angle of elevation of the point t is 25 degrees.If the building is20 meters high. Calculate the distance pt
Penny Nom lui répond.
A quadrilateral with 4 known sides and 1 known angle 2010-03-19
samuel pose la question :
Name: Samuel
Status: Student

I have a quadrilateral with 4 known sides and 1 known angle, and I'm trying to evaluate the other angles of my quadrilateral.

By the law of cosines, I can easily find my opposite angle (using the diagonal as a basis for the equation).

However, to find the two remaining angles, I have found no other way so far than to use the other diagonal, which can be found with the equation attached (from geometry atlas).

Is there any simpler way?

Robert Dawson and Harley Weston lui répond.
Solving a triangle 2010-01-25
Paige pose la question :
how do i solve a triangle with one angle of 73 degrees, one angle of 32 degrees, and one side of 23cm?
Harley Weston lui répond.
A telephone pole on a slope 2009-12-14
Marissa pose la question :
A 10 meter telephone pole casts a 17 meter shadow directly down a slope when the angle of elevation of the sun is 42 degrees. Find the angle of elevation of the ground. Its a law of sines problem.
Penny Nom lui répond.
Three angles and one side of a triangle 2009-11-16
Esther pose la question :
How do i find the sides of an acute triangle if i know the angels are 60,45,75 and i only know one side which is 10? Thanks!
Penny Nom lui répond.
Find the resultant of this displacement pair 2009-02-22
katydidit pose la question :
Find the resultant of this displacement pair:
500 miles at 75 degrees east of north and 1500 miles at 20 degrees west of south.
How do I graph this and how do I solve this problem?

Penny Nom lui répond.
The path of a small sailboat 2008-11-19
jane pose la question :
a sailor in a small sailboat encounters shifting winds. she sails 2.00 km East then 3.40 km North East, then an additional distance in an unknown direction. Her final position is 6.68 km directly east of the starting point. find the magnitude & direction of the third leg of the voyage.
Harley Weston lui répond.
Solving for Shared Height of Two Right Triangles 2008-08-17
Heidi pose la question :
find the height of a triangle, which can be split into two right triangles, but the base (50m) is not split equally in half. one end of the base is 40 degrees, while the other is 30 degrees.
Janice Cotcher lui répond.
Two solutions using the law of sines 2008-01-14
Kate pose la question :
I am working on the Law of Sines and I have a problem that says: Find a value for b so that the triangle has 2 solutions.

I am given that A = 36 degrees and a = 5. Now, I learned that for a triangle to have 2 solutions, h < a < b. BUT...my answer key says the answer is: 5 < b < 5/sin 36. I can't figure out how to make this fit with h < a < b.

Harley Weston lui répond.
The length of the third side of a triangle 2007-08-15
Brooklyn pose la question :
What is the equation to find the length of the third side of a triangle if you have the length of A, B, and the angles(s)?
Stephen La Rocque lui répond.
Angles of depression 2007-06-13
Phonda pose la question :
The pilot of a small private plane can look forward and see the control tower for a small airstrip. Beyond that is a large factory that is 3 milies from the airstrip. The angles of depression are 12.5 degrees and 4.8 degrees respectively. Find the airplane's altitude, to the nearest ten feet.
Stephen La Rocque lui répond.
The area of a quadrilateral 2007-06-10
Lucy pose la question :
Calculate the area of the quadrilateral ABCD. AB= 4.1cm, BC = 7.6cm, AD= 5.4 cm, CD= ? Angle ABC = 117, Angle ADC = 62. Give your answer correct to 3 significant figures.
Stephen La Rocque and Penny Nom lui répond.
The law of sines 2007-06-09
Felicia pose la question :
A parallelogram has one side that is 12.0 cm and one angle that is 65°. The shorter diagonal is 25.0 cm. To the nearest tenth of a centimetre, how long is the other side of the parallelogram? Use the sine law.
Penny Nom lui répond.
The distance between two fire towers 2007-03-23
tony pose la question :
Two fire towers are 30km apart, tower A is due west of tower B. A fire is spotted from the towers, and the bearing from A and B are N76degreesE and N56degreesW, respectively. Find the distance from the fire to the straight line connecting tower A to tower B.
Stephen La Rocque lui répond.
A trig problem 2006-06-24
Greg pose la question :
A and B are two towers, B being 4 km due east of A. The true bearings of a flagpole, C, from A and B are α east of north and α west of north respectively. The true bearings of a second flagpole, D, from A and B are (α + β) east of north and (α - β) west of north respectively. Assuming A, B, C, and D are on level ground, and that α = 25, β = 10, find the distance between C and D.
Penny Nom lui répond.
Given three angles and a side 2006-04-09
Jon pose la question :
How do you figure out the length of all sides of a scalene triangle if given the measure of all angles, and one side?
Stephen La Rocque lui répond.
Solving triangles 2004-10-30
Allen pose la question :
Solve the following triangles.


1. B = 20 Degrees, a = 25, b = 16
2. A = 35 Degrees, b = 2, c = 3
3. A = 32 Degrees, C = 44, c = 20

Harley Weston lui répond.
The law of sines 2004-08-01
Joy pose la question :
How do you solve this? Do you solve this triangle using the law of sines of the law of cosines? (ASA)

A=120DEG. B=40DEG c=35 cm I keep getting different answers.

Penny Nom lui répond.
Finding bearings 2004-05-24
James pose la question :
This question is about finding bearings. A boat race starts from point A, goes North to Point B, a distance of 1000 meters. The course is triangular. The bearing from point B to point C is South 70degrees West. The distance from Point B to point C is 1500 meters. Find the course bearing from C to A.
Penny Nom lui répond.
Laws of sines and cosines 2003-11-23
A parent pose la question :
On the one side of a stream lines PA= 586.3 feet, PB = 751.6 feet are measures, angle APB being 167 degrees and 36 min. Q is a point on the opposite side of the stream. Angle PAQ=63 degress and 18 min and PBQ=49 degrees and 24 min. Find PQ.
Penny Nom lui répond.
Adding vectors 2002-01-12
Lena pose la question :
how do you add vectors together?
If you are given the length and angles of both vectors and are asked to add/subtract them, how do you do it? I know you are supposed to do the head to tail method, but whenever i try it i get the wrong answer. I need help setting it up.

example: A is 2.7cm, and 60 degrees, B is 1.6cm and 135 degrees, find the magnitude and amplitude

Penny Nom lui répond.
The angles in a triangle 2001-05-11
Nikki pose la question :
Find the measure, to the nearest degree, of each angle of a triangle with sides of the given lengths.

26, 35, 40

Penny Nom lui répond.
A famous landmark 2001-03-23
Corinne pose la question :
A family is traveling due west on a road that passes a famous landmark. At a given time the bearing to the landmark is N 62 degrees W, and after the family travels 5 miles farther the bearing is N 38 degrees W. What is the closest the family will come to the landmark while on the road?
Harley Weston lui répond.
The laws of sines and cosines 2001-01-02
Faydene pose la question :
Can the sine /cosine rule be applied to a right -angle triangle to find a particular solution or are these 'rules' applied only when the triangle is not right angled?
Penny Nom lui répond.
Vector Problem 2000-11-27
Ben pose la question :
An aircraft can fly 260km/h in still air and the wind is blowing at 70km/h towards the West. In what direction should the aircraft head so that its actual velocity is on a bearing of 030 degrees?
Harley Weston lui répond.
Sines & cosine laws 1999-12-10
Pierre Boivin pose la question :
Triangle LMN, angle L=71 degree , LM= 7.2 , MN=8.3 , ln= 5.9

The questiion was to find angle M. Using the cosine law I found the answer to be 44 degree. It is also the book answer. Using the sines law I found the answer to be 42.2 degree. why can't I use the sines law.
Chris Fisher lui répond.




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