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Mathematics 20 Online
OpenStudy (anonymous):

tan(2arctan(-3))

OpenStudy (anonymous):

3/4

OpenStudy (anonymous):

hi! please explain how you got that

OpenStudy (anonymous):

let x=2arctan(-3) =2(-71.565051) =-143.1301 then tan(x)=3/4

OpenStudy (anonymous):

how do you get that without using a calculator?

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