" If "sin x+sin y>=cos alpha cos x,AA x in R," then "sin y+cos alpha" is equal to "

If sin x + sin y> = cos alpha cos x, AA x in R then sin y + cos alpha =

If sin x+sin y>=cos a cos x AA in R, then sin y+cos a is equal to

int(sin x+cos x)/(sin(x -alpha))dx is equal to

int(sin x+cos x)/(sin(x -alpha))dx is equal to

If x cos alpha + y sin alpha = x cos beta + y sin beta "then" (sin alpha - cos alpha - sin beta + cos beta)/(sin alpha + cos alpha - sin beta - cos beta)=

If sin x + sin y = a and cos x + cos y = b , what is sin x.sin y + cos x .cos y equal to ?

What ( sin x cos y + cos x sin y) (sin x cos y - cos x sin y) equal to ?

If cos x + cos y + cos alpha = 0 and sin x + sin y + sin alpha = 0 then cot ((x + y) / (2)) =