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anonymous
 5 years ago
find the exact value of : cos(2 arctan(4/3))
anonymous
 5 years ago
find the exact value of : cos(2 arctan(4/3))

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amistre64
 5 years ago
Best ResponseYou've already chosen the best response.02 tan^1(4/3) gives us an angle between (pi/2,pi/2)...

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0its a 435 triangle, I notice that

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0345....but same difference lol

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0the cos will equal 3/5, so 2(3/6) = 6/5 that might help us

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0cos(cos^1(6/5)) sounds right so cos(t) = 6/5 .... is that findable?

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0or is that our answer :)

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0to recap...for my own sanity: cos(t) = x t = 2 tan^1(4/3) t = 2 cos^1(3/5) t =2 cos^1(3/5) cos(2 cos^1(3/5)) i now this is suppose to help me....

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0t/2 = cos^1(3/5) might fit someplace

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0lol...i think i confused myself again

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0oh i figured it out the answer is 7/25, thanks for your help
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