solve the equation below on interval [0,pi). cos2x=1/2

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anonymous · Answer 1 · 2013-05-25T18:43:21+0000

kosine(2x)=0.5

take invers kosine...yu get 60 deg

so x=30 deg

#### but waet...-60 deg hav same kosine at 60 deg

& 180-60=120 deg also hav same value

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solve the equation below on interval [0,pi). cos2x=1/2

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