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Mathematics 8 Online
OpenStudy (anonymous):

Look at the locations A, B, and C on the road map shown below. What is the distance between location A and location B?

OpenStudy (anonymous):

OpenStudy (anonymous):

@dan280291 @ganeshie8 @jim_thompson5910 @hba

jimthompson5910 (jim_thompson5910):

hint: tan(angle) = opp/adj tan(70) = x/4

OpenStudy (anonymous):

Use your calculator. ;)

OpenStudy (anonymous):

ok can u break it down and show me how to do it?

jimthompson5910 (jim_thompson5910):

tan(70) = x/4 4*tan(70) = x x = 4*tan(70) Now use a calculator

OpenStudy (anonymous):

so 4 x's tan 70?

jimthompson5910 (jim_thompson5910):

yes 4 times tan 70

OpenStudy (anonymous):

10.9899096778184

jimthompson5910 (jim_thompson5910):

nailed it

OpenStudy (anonymous):

http://www.mathopenref.com/trigfunctions.html this will help you find the others. :)

OpenStudy (anonymous):

ok so which one is it?

jimthompson5910 (jim_thompson5910):

notice how 4/cot(70) is equivalent to 4*tan(70)

jimthompson5910 (jim_thompson5910):

you can use a calculator to confirm

OpenStudy (anonymous):

i did that and it gave me a long number

jimthompson5910 (jim_thompson5910):

should be the same long number

OpenStudy (anonymous):

ok but thats not a choice in the asnwers

jimthompson5910 (jim_thompson5910):

3rd choice, 4/cot(70)

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