More Trig help :) (1 Viewer)

cookiez69

What a stupid name, Nat.
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Solve the equation, for

a) 2cos(2x) - 1 < 0

Please and Thank you very much!
 
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The first thing you want to do is to manipulate the 'x' on the LHS.

So take the 1 across and then divide by two to get

and you should be able to go from there.

A graphical approach might be useful.
 

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