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Mathematics 8 Online
OpenStudy (anonymous):

can somone help me find b

OpenStudy (anonymous):

OpenStudy (ivettef365):

use cos20 = b/12

OpenStudy (anonymous):

so12 /by cos20?

OpenStudy (ivettef365):

right, what do you get ?

OpenStudy (anonymous):

12.7?

OpenStudy (ivettef365):

I got 11.2 did you multiply 12 x cos(20)

OpenStudy (anonymous):

i divided

OpenStudy (ivettef365):

you need to multiply

OpenStudy (anonymous):

alrighty

OpenStudy (anonymous):

wat about this one

OpenStudy (ivettef365):

because is like solving an algebra equation you have (12) . cos(20) = b/12 .(12) then you have left 12. cos(20) = b

OpenStudy (ivettef365):

which letter you need to find

OpenStudy (anonymous):

b again lol not the angle

OpenStudy (ivettef365):

then you use tan(50) = b/4

OpenStudy (ivettef365):

tan = opp/adj

OpenStudy (anonymous):

so 4*tan(50) or 4/tan(50)

OpenStudy (ivettef365):

multiply

OpenStudy (anonymous):

4.7

OpenStudy (ivettef365):

correct

OpenStudy (ivettef365):

4.76, if you round it would be 4.8

OpenStudy (anonymous):

alright

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