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anonymous
 one year ago
find the missing value. cos__=2/5
how to do this
anonymous
 one year ago
find the missing value. cos__=2/5 how to do this

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Don't you use the unit circle?

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.2you need to use calculator

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.2\(\cos\_\_ = 2/5 \) \(\_\_= \cos^{1}(2/5)\)

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.1ti83 calculator xD I think any calculator can do it

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.2wolfram can do it too http://www.wolframalpha.com/input/?i=cos%5E%281%29%282%2F5%29

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.1I got 66.42 off of my windows calculator in degree mode

ganeshie8
 one year ago
Best ResponseYou've already chosen the best response.2i think solving analytically is hard we can approximate using newton or some other numerical stuff
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