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help with equation

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steph33
 
Reply Wed 9 Nov, 2016 11:20 am
hello, can someone help me with this equation??looked for help at Edit [Moderator]: Links removed but nothing so far..thanks..

tg α = m, (m = √3); π<α<3π/2
find: cos α, cos α/2, cos 2α
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Type: Question • Score: 0 • Views: 1,082 • Replies: 1
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fresco
 
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Reply Wed 9 Nov, 2016 11:56 am
@steph33,
If tg means 'tangent' then from tan^-1 root 3
a = 240 degrees (4pi/3)
(root 3 is the 60 degree and 240 degree value but 60 degrees is less than pi)

Go from there.
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