If `2 sin x+5 cos y+7 sin z=14` then `7 tan (x/2)+4 cosy-6 cos z= `

If 2sin x+5cos y+7sin z=14 then 7(tan x)/(2)+4cos y-6cos z=

If 2sin x+5cos y+7sin z=14 then 7tan((x)/(2))+4cos y-6cos z=

If 2 sin x + 5 cos y + 7 sin z = 14 then 7 tan. (x)/(2) + 4 cos y - 6 cos z =

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

If sin x + sin y + sin z = 0 and cos x + cos y + cos z = 0 then prove that cot (x+y)/2 = cot z and cos (x-y)/2 = pm 1/2

If sin x+siny=1/4,cos x+cosy=1/3 then tan((x+y)/2)=

Find theta, if sin x = 2sin theta, cos x = tan y, tan x = cos z and cos y = tan z

If x+y+z= (pi)/(2) show that sin 2x + sin 2y + sin 2z =4 cos x cosy cos z

cos x + cos y + cos z = 0 and sin x + sin y + sin z, then cos ^(2) (( x-y)/( 2)) =