" 1.If "sin x+sin y=sqrt(3)(cos y-cos x)" then show that "sin3x+sin3y=0

If sinx + sin y = sqrt3 (cosy-cos x),"then show that" sin 3x+ sin 3y = 0

If sin x + sin y = sqrt (3) (cos y-cos x), then sin3x + sin3y =

If sin x+sin y=sqrt(3)(cos y-cos x) then (sin3x)/(sin3y)=

If sin x+sin y=sqrt(3)(cos y-cos x), then sin3x+sin3y=(a)2sin3x( b) 0(c)1(d) none of these

If sin x+sin y=3(cos y-cos x) then the value of sin 3 x+sin 3 y=

If sinx+siny=sqrt(3)(cos y-cos x), then sin3x+sin3y= ___________ (a) 2sin3x (b) 0 (c) 1 (d) none of these

If sin x+sin y=3(cos y-cos x) then (sin2020x)/(sin2020y)

If sinx siny = 3 (cosy - cos x) then (sin3x)/(sin3y) =

Prove that (i) 2 cos x cos y=cos (x+y)+cos (x-y) (ii) -2 . sin x sin y=cos (x+y)-cos (x-y) (iii) 2 sin x cos y=sin (x+y)+sin (x-y) (iv) 2 cos x sin y=sin (x+y)-sin (x-y)