Find the most general solution of the following
(i) sin 6x=sin 4x-sin 2x
(ii)sec 4x-sec 2x=2
(iii)`3-2 cos theta - 4 sin theta - cos 2 theta + sin 2theta =0
(iv)`2(cos theta + cos 2 theta )+ sin 2 theta (1+cos theta)=2 sin theta`

Answer

(i) `mpipm(pi)/(6),(n pi)/(4)`
(ii)`(2n+1)(pi)/(10),(2m+1)(pi)/(2) `
(iii)`2npi,2npi+(pi)/(2)`
(iv)`2npi(pi)/(2),2npui+(pi)/(3),(2n+1)pi`