[" If "cos((pi)/(4)-x)cos2x+sin x sin2x sec x],[=cos x sin2x sec x+cos((pi)/(4)+x)cos2x],[" then possible value of "sec x" is "]

If cos(pi/4-x)cos2x+sinxsin2xsecx=cos x sin 2x sec x+cos(pi/4+x)cos 2x then possible value of sec x is

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

cos x-sin x = sqrt (2) cos (x + (pi) / (4))

(sin x + cos x)^(2) + cos^(2)((pi)/(4) + x) in

(sin x+cos x)^(2)+cos^(2)((pi)/(4)+x)in

( sin x - cos x)^(2) + cos^(2) ((pi)/(4) - x) in

(cos (pi + x) cos (-x)) / (sin (pi-x) cos ((pi) / (2) -x)) = cot ^ (2) x

If cos2x>|sin x| and x in(-(pi)/(2),pi) then x

The value of cos y cos ((pi)/(2) - x) - cos ((pi)/(2) - y) cos x + sin y cos ((pi)/(2) - x) + cos x sin ((pi)/(2) - y) is zero if

sin_( if )x+sin2x+sin3x=cos x+cos2x+cos3x