Thread: using the unit circle

Find all values of x on [0, 2pi] that satisfy the equation:

a) 2 cos(x)-1 b) 2sin^2(x) =1

I think I can somehow use the unit circle for this one, and the 2pi periods of the trig functions to find other possible answers that fit the domain, but I don't really know where to begin.

I would appreciate any tips,

Dave

Originally Posted by 2clients

Find all values of x on [0, 2pi] that satisfy the equation:

a) 2 cos(x)-1 = ? b) 2sin^2(x) =1

(b) ...