If `cos^(2)x-2cos x-4sin x+sin2x=0`, then `tan((x)/(2))` can be equal to

3-2cos x-4sin x-cos2x+sin2x=0

cos2x-sin2x>=0

If sin^(2)4x+cos^(2)x=2sin4x cos^(2)x, then

If sin^(4)2x+cos^(4)2x=sin2x*cos2x then x=

If sin x+sin y=a and cos x+cos y=b, then tan((x+y)/2 ' is equal to

If sin x+cos x=(sqrt(7))/(2) where x in[0,(pi)/(4)] then tan((x)/(2)) is equal to

If 2sin x-cos2x=1 ,then (cos^(2)x+cos^(4)x+4)/(2) is equal to

The number of solution of the equation sin^(3)x cos x+sin^(2)x cos^(2)x+cos^(3)x sin x+1=0 in the interval [0, 2pi] is equal to

4sin x cos x+2sin x+2cos x+1=0

(1-cos 2x + sin x)/(sin 2x + cos x) = tan x