A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
PLEASE HELP: MEDAL AND FAN
Solve the triangle.
A = 51°, b = 11, c = 7
anonymous
 one year ago
PLEASE HELP: MEDAL AND FAN Solve the triangle. A = 51°, b = 11, c = 7

This Question is Closed

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0can you help? @swamijatin2

swamijatin2
 one year ago
Best ResponseYou've already chosen the best response.0what we have to find perimeter or area

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0lol wrong thing sorry

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I need a (side a); C(angle c); and B(angle b)

swamijatin2
 one year ago
Best ResponseYou've already chosen the best response.0or well that doesnt have to be a right triangle but

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0draw a triangle that looks reasonably like this one then use the law of cosines

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i have a triangle but how do i use the law of cosines (i know what it is just not how to do it)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[a^2=b^2+c^22bc\cos(A)\] \[a^2=11^2+7^22\times 11\times 7\cos(51^\circ)\] and a calculator

swamijatin2
 one year ago
Best ResponseYou've already chosen the best response.0To solve the traingle we need to find remaining side a and angles B and C. Use law of cosines a2 = b2 + c2  2bc cosA a2 = (11)2 + (7)2  2(11)(7) cos(51) a2 = 121 + 49  154 cos(51) a2 = 170  154(0.629) a2 = 170  96.866 a2 = 73.134 a = 8.55

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i got that ok so how about the and C

swamijatin2
 one year ago
Best ResponseYou've already chosen the best response.0Now use law of sines sinA/a = sinB/b sin(51)/ 8.55 = sin(B)/11 sin(B) = 11[sin(51)/ 8.55] sin(B) = 11[0.777/8.55] B = sin1(0.999) B = 87.43°

swamijatin2
 one year ago
Best ResponseYou've already chosen the best response.0Sum of angles in triangle = 180° A + B + C = 180 C = 180  (A + B) C = 180  (51 + 87.43) C = 180  138.43 C = 41.57°

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0http://www.wolframalpha.com/input/?i=sqrt%2811^2%2B7^22*11*7*cos%2851%29%29

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0because none of those are my answers

swamijatin2
 one year ago
Best ResponseYou've already chosen the best response.0then you are incorrect anywhere

swamijatin2
 one year ago
Best ResponseYou've already chosen the best response.0did u get the answers

anonymous
 one year ago
Best ResponseYou've already chosen the best response.08.5 is a which is only for one answer choice where B = 85.9 and C = 39.1

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0a ≈ 12.8, C ≈ 39.1, B ≈ 89.9 a ≈ 8.5, C ≈ 39.1, B ≈ 89.9 No triangles possible a ≈ 12.8, C ≈ 43.1, B ≈ 85.9

swamijatin2
 one year ago
Best ResponseYou've already chosen the best response.0you r correct but according to question we have to do

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0please finish helping me @swamijatin2

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0we have done a lot but it doesn't match my answer choices

phi
 one year ago
Best ResponseYou've already chosen the best response.1can you repost the question and the answer you got? It would take a long time to read through all of the posts up above.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Solve the triangle. A = 51°, b = 11, c = 7

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Work From above: a2 = b2 + c2  2bc cosA a2 = (11)2 + (7)2  2(11)(7) cos(51) a2 = 121 + 49  154 cos(51) a2 = 170  154(0.629) a2 = 170  96.866 a2 = 73.134 a = 8.55 Now use law of sines sinA/a = sinB/b sin(51)/ 8.55 = sin(B)/11 sin(B) = 11[sin(51)/ 8.55] sin(B) = 11[0.777/8.55] B = sin1(0.999) B = 87.43° Sum of angles in triangle = 180° A + B + C = 180 C = 180  (A + B) C = 180  (51 + 87.43) C = 180  138.43 C = 41.57°

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0My answer choices are: a ≈ 12.8, C ≈ 39.1, B ≈ 89.9 a ≈ 8.5, C ≈ 39.1, B ≈ 89.9 No triangles possible a ≈ 12.8, C ≈ 43.1, B ≈ 85.9

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so... what do we do?

phi
 one year ago
Best ResponseYou've already chosen the best response.1side a is correct. a= 8.55 redo your work for angle B

phi
 one year ago
Best ResponseYou've already chosen the best response.1the problem is when you do the work for angle B, you need lots of decimals of accuracy. for side a, don't round it to 8.55. use all the digits your calculator has.

phi
 one year ago
Best ResponseYou've already chosen the best response.1it might be more accurate to first find angle C sin C = (7*sin51)/8.548956649

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0what do you get for angle B i got the same answer

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I got 0.63633750 Radians for C?

phi
 one year ago
Best ResponseYou've already chosen the best response.1sin C = 0.63633750 C= asin( 0.63633750 ) = 39.519 deg

phi
 one year ago
Best ResponseYou've already chosen the best response.1summarizing a= 8.55, b= 11, c= 7 A= 51, B= 89.5, C= 39.5 the best match to your choices is choice B

phi
 one year ago
Best ResponseYou've already chosen the best response.1if we use a=8.6 (round from 8.55) we would get C= 39.2 and B= 89.8 which is even closer to choice B.

phi
 one year ago
Best ResponseYou've already chosen the best response.1because they use ≈ which means approximately it is reasonable to pick choice B. And the other choices are not "in the ball park"
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.