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Mathematics 10 Online
OpenStudy (anonymous):

Please help! Use a half-angle identity to find the exact value of cos19pi/12

OpenStudy (anonymous):

|dw:1401689915547:dw|

OpenStudy (anonymous):

|dw:1401690053187:dw|

OpenStudy (anonymous):

how can I find cos19pi/12?

OpenStudy (anonymous):

19pi/12 is in Quad IV so its a pos x

OpenStudy (anonymous):

*positive x

OpenStudy (anonymous):

its not a special angle...

OpenStudy (anonymous):

@zepdrix

OpenStudy (anonymous):

@goformit100 @sourwing

OpenStudy (goformit100):

it's correct

OpenStudy (anonymous):

but how do i solve it i didn't actually solve anything i just put it in the formula...

OpenStudy (anonymous):

@goformit100

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