`sin(x+alpha)sin(x-alpha)=?`

int sin alpha sin(x-alpha)+sin^(2)((x)/(2)-alpha)]dx

If sin(x +3alpha)=3 sin (alpha-x) , then

If sin(x+3 alpha)=3sin (alpha-x) then

If sin(x +3alpha)=3 sin (alpha-x) , then

If sin(x +3alpha)=3 sin (alpha-x) , then

If sin(x+3 alpha)=,3sin(alpha-x) then (A) tan x,=tan alpha (B) tan x,=tan^(2)alpha (C) tan x,=tan^(3)alpha (D) tan x,=3tan alpha

If (sin alpha)x+y+sin^(2)alpha=0.(sin alpha)x-(2sin a)y+1=0 and x+6y=0 are three concurrent lines,then numberof values of alpha in [0,pi] is

lim_(x rarr0)(sin(alpha+x)-sin(alpha-x))/(cos(alpha+x)-cos(alpha-x))