Homework Help: trig

Posted by Janet on Sunday, March 11, 2012 at 7:09pm.

City A is 300km due east of city B. City C is 200km on a bearing of 123¤ from city B. How far is it from C to A?

trig - Janet, Sunday, March 11, 2012 at 7:17pm
171km
trig - Damon, Sunday, March 11, 2012 at 7:20pm
123-90 = 33 south of east
law of cosines
b^2 = a^2 + c^2 - 2 a c cos B
b^2 = 200^2 + 300^2 - 2(200*300) cos 33
trig - Damon, Sunday, March 11, 2012 at 7:21pm
yes I get 171.346

Related Questions

trig - City A is 300km due east of city B. City C is 200km on a bearing of 123&...
trig - City A is 300km due east of city B. City C is 200km on a bearing of 123&...
physics - An airplane ﬂies 137 km due west from city A to city B and ...
Physics - An airplane ﬂies 137 km due west from city A to city B and ...
College Physics - An airplane flies 200 km due west from city A to city B and ...
Physics - An airplane flies 200 km due west from city A to City B and them 300 ...
physics - An airplane flies 200 km due west from city A to city B and then 270 ...
physics - an airplane flies 200 km due west from city A and then 350 km in the ...
physics - an airplane flies 200 km due west from city A and then 350 km in the ...
physics - An airplane flies 200 km due west from city A to city B and then 245 ...

For Further Reading

First Name:
School Subject:
Answer: