Use trigonometric identities to solve each equation within the given domain. a) -sin^2(x)=cos(2x) from [-pi, pi]
b) 3tan(x)=2sin(2x) from [0, 2pi)
c) sec(x)cos(3x)=0 from [-pi/2, pi/2]
d) 1-cos(x)=2-2sin^2(x) from (-pi, pi)
e) 4cos^4(x)-5cos^2(x)+1=0 from [0, 2pi)