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Mathematics 15 Online
OpenStudy (ketz):

Hi, Can anybody solve cos x >0.69? ...It's urgent... Thxs

OpenStudy (anonymous):

take cos^-1 of both sides

OpenStudy (ketz):

but should the inequality sign change?

OpenStudy (anonymous):

I don't think so, doesn't it only change when you divide or multiply by a negative number

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