26 Answered Questions for the topic Law of Sines

#### law of sines and law of cosines

In triangle ABC m<A=20o , m< C = 130o , a= 10in. Find the length of C.

04/06/20

#### Jack wants to build a tree house.

His parents worry that he is building it too high. If Jack’s dad is looking at the tree house location from a 39° angle and then moves back 10 feet so he can see it at a 31° anglehow high is the...
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Law Of Sines

04/04/18

#### In ΔGHI, h = 94 inches, ∠H=84° and ∠I=84°. Find the length of i, to the nearest 10th of an inch.

I need help figuring out this problem. My teacher tried explaining but i just got more confused.

03/02/18

#### See Description

One end of a wire is attached to the top of the tower and the other end to a stake in the ground that is 44’ from the base of the tower. The wire makes a 64 degree angle with the flat ground. If...
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Law Of Sines Law Of Cosines

02/13/18

#### explain when one should use the law of cosine instead of the law of sine

explain when one should use the law of cosine instead of the law of sine

05/15/17

#### Find the area of the triangle using law of sines

Base = 29cm, height = 8 cm, angle between the two = 100 degrees.

03/12/17

#### Setting up the trig equation. Using sine or cosine.

Tami and Dustin are on opposite sides of the washington monument, which is 555 feet. Tami's angle of elevation to the top of the monument is 38 degrees. Dustin's angle of elevation is 64 degrees....
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Law Of Sines

12/04/16

#### Law of Cosines 5.2

For the triangle ABC, which of these is not a Law of Cosines?
(a) a2=b2+c2-2bc cos A
(b) b2=c2+a2- 2ac cos B
(c) c2=a2+b2-2ab cos C
(d) a2=b2+c2-2ab cos A
Please show step by...
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Law Of Sines

12/03/16

#### Law of Sines

Given the triangle ABC with angles A= 58°, B=70°, and side c=21cm. Using the Law of Sines, find the length of the side a. Approximate your answer to the nearest whole number.
Show all step by...
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07/05/16

#### Need help ASAP with law of sines and finding side b of triangle using law of sines please help

Find the value of side b for each triangle using The Law of Sines:
1)A=24.3 degrees C=54.6 degrees a=2.68
2)B=10 degrees C=135 degrees c=45
3)A=10 degrees B=60 degrees a=7.5

07/05/16

#### pre calc BEARING problems, multiple questions, please answer ASAP, I am very confused

1)The bearing from A to B is 40°. Determine the bearing of A from B.
2) If the beating from A to B is 120 degrees. Determine the bearing of A from B.
3) Describe in words what the bearing "N20...
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Law Of Sines Law Of Cosines

06/02/16

#### 0 0 A man wants to build a triangular lot. What would Angle A, B, and C? (Side lengths in description)

P.s sorry can't draw the triangle it would have made it easier.AB is 211.BC is 142. AC is 185. Thanks :)

Law Of Sines Law Of Cosines

06/01/16

#### A man wants to build a triangular lot. What would Angle A, B, and C? (Side lengths in description)

P.s sorry can't draw the triangle it would have made it easier.
AB is 211.
BC is 142.
AC is 185.
Thanks :)

Law Of Sines Law Of Cosines

05/31/16

#### Angle A is 43, Angle B= 70 b=85 what is a?

find the indicated side to the nearest tenth.
Thanks :)

#### Solve for 2cos-sin^2x=cos^2x over the interval [0,2pi)

Solve for 2cosx - sin2x= cos2x over the interval [0,2pi)
1.) x=pi/6 and 11pi/6
2.) x=5pi/6 and 7pi/6
3.) x=2pi/3 and 4pi/3
4.) x=pi/3 and 5pi/3

05/01/16

#### A 50-meter vertical tower is braced with a cable secured at the top of the tower, 30 meters away from the base. What angle doe the cable make with the tower?

law of sines

04/02/16

#### How do I know if my SSA triangle has more than one set of answers?

Solve the triangle using the law of sines:
a = 75
b = 100
c = ?
<A = 30°
<B = ?
<C =?
My work:
Sin B / 100 = sin 30 / 75
Sin B = (100 * sin(30°))/75
Sin B = .6667
Sin-1...
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#### Solve the triangle using the Law of Sines: Did I do this correctly?

Given: <B = 29 degrees. <C = 51 degrees. b = 44
51 + 29 = 80 degrees. <A = 100 degrees.
Sin51° / c = sin29°/44
c = 44sin51° / sin29°
c = 70.5
then
sin100° / a =...
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Law Of Sines Obstuse Triangles

02/28/16

#### Where is the 6.5°

I need to know where this angle would go I'm order to solve for the rest of the triangle.
A 12.0m tall power pole is leaning 6.5° off of the vertical because of soil erosion. A wire attached...
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12/20/15

#### In ?PQR, q = 45 cm, ?Q=117° and ?R=18°. Find the length of p, to the nearest 10th of a centimeter.

In ΔPQR, q = 45 cm, ∠Q=117° and ∠R=18°. Find the length of p, to the nearest 10th of a centimeter.

Law Of Sines

04/11/15

#### Solve the triangle using law of sines. If no triangle is formed, state so. Round answers to the nearest hundredth.

1.
A=33 degrees, a=20,b=13
2.
C=137degrees, a=19,c=8

Law Of Sines Math Analysis

03/16/15

#### Need help finding the missing angles and sides for a triangle?

I'm having trouble finding the missing sides and angles for the triangle. I know you have to use law of sines to find them, but I'm having trouble. Any help is greatly appreciated!
A= 42°, C=...
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09/15/14

#### In triangle ABC: B , C are two acute angles

AD is drawn perpendicular to BC ,m(BAD)=alpha,and m(CAD)=beta
Prove that:AD=a*cos(alpha)*cos(beta)/sin(alpha+beta)

Law Of Sines

04/14/14

#### Two sides and an angle are given. Determine whether the given information results in one triangle, two triangles, or no triangle. Solve any triangle that result

Side a = 26; Side b = 20;
Angle B = 15 degrees

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