23 Answered Questions for the topic 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

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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... more

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.... more

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... more

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... more

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... more

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 :)

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 :)

05/31/16

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

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

05/28/16

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

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... more

03/26/16

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 =... more

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... more

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.

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

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=... more

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)  

11/13/13

Width of the crater in meter

Points A and B are in opposite sides of a lunar crater. Point C is 45 meters from point A. The measure if angle BAC is 114 degrees and the measure of angle ACB is 45 degrees. What is the width of... more

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