" 6."sin x sqrt(cos^(2)x+2cos x+2)

sqrt(sin 2x) cos 2x

sqrt(sin 2x) cos 2x

If (pi)/(4)

If "sin" x + "sin"^(2) x = 1 show that: cos^(4)x + cos^(2)x = 1 (ii) If "sin" x + cos x =sqrt(2) cos x show that: sqrt2 sin x = cos x - sin x

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

sqrt(cos 2x) + sqrt(1 + sin 2x) = 2sqrt(sin x + cos x) if

If tanx=b/a then sqrt((a+b)/(a-b))+sqrt((a-b)/(a+b))= ........................... A) (2 sin x)/(sqrt(sin2x)) B) (2 cos x)/(sqrt(cos2x)) C) (2 cos x)/(sqrt(sin2x)) D) (2 sin x)/(sqrt(cos2x))

cos x+sin x=sqrt(2)cos x then

Show that (sin 8x cos x - sin 6x cos 3x)/(cos 2x cos x - sin 3x sin 4x) = tan 2x