Posted by adil ahmed on .
solve algebreically the equation
cos2x=1sinx
also cosx=cosx1
and please also sin2x=3sinx

maths please answer NOW!!!!! 
bobpursley,
Isn't cos2x=cos^2xsin^2x=12sin^2 x ?
put that into the left side, gather terms, and you have a quadratic equation.
The second makes no sense.