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boomerang285
Group Title
Please help...
Determine the measure of side c, given:
a=3m
b=4m
B=41deg
 one year ago
 one year ago
boomerang285 Group Title
Please help... Determine the measure of side c, given: a=3m b=4m B=41deg
 one year ago
 one year ago

This Question is Closed

AravindG Group TitleBest ResponseYou've already chosen the best response.1
tried cosine rule ?
 one year ago

boomerang285 Group TitleBest ResponseYou've already chosen the best response.0
im not sure how to do this at all....
 one year ago

AravindG Group TitleBest ResponseYou've already chosen the best response.1
do u knw cosine rule ?
 one year ago

boomerang285 Group TitleBest ResponseYou've already chosen the best response.0
i have just started learning about it
 one year ago

AravindG Group TitleBest ResponseYou've already chosen the best response.1
ok \[\cos B=\dfrac{a^2+c^2b^2}{2ac} \]
 one year ago

AravindG Group TitleBest ResponseYou've already chosen the best response.1
now solve for b
 one year ago

t_soulb Group TitleBest ResponseYou've already chosen the best response.0
yea good cosine rule,,my answer is b=2.44 (approx.)
 one year ago

dan815 Group TitleBest ResponseYou've already chosen the best response.0
u could use sin law too i think
 one year ago

t_soulb Group TitleBest ResponseYou've already chosen the best response.0
sorry 1.22
 one year ago

AravindG Group TitleBest ResponseYou've already chosen the best response.1
@dan815 sin law wont work cause we need two angles :/
 one year ago

dan815 Group TitleBest ResponseYou've already chosen the best response.0
sin <b/b=sin<a=a sin<(180(a+b))/c and solve for C
 one year ago

dan815 Group TitleBest ResponseYou've already chosen the best response.0
use my equation < means angle
 one year ago

boomerang285 Group TitleBest ResponseYou've already chosen the best response.0
actually my options are: 1.6m 4.5m 0.1m 5.7m I thought it was 1.6m?
 one year ago

boomerang285 Group TitleBest ResponseYou've already chosen the best response.0
am I wrong?
 one year ago

boomerang285 Group TitleBest ResponseYou've already chosen the best response.0
actually it was 5.7 after I figured it out.. Thanks though
 one year ago

dan815 Group TitleBest ResponseYou've already chosen the best response.0
did u use my formula!
 one year ago

t_soulb Group TitleBest ResponseYou've already chosen the best response.0
yea approx.
 one year ago

boomerang285 Group TitleBest ResponseYou've already chosen the best response.0
yes thank you
 one year ago

dan815 Group TitleBest ResponseYou've already chosen the best response.0
if u remember that you need atleast 3 pieces of information to solve a triangle and that if the angle given is the angle of the opposite side then you can always use sin law if they give u like side a and b but give you angle C then you have to use cos law if its not a right angle triangle
 one year ago
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