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

If 2sin x+5cos y+7sin z=14 then 7(tan 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+sin y+sin z=3. Find the value of cos x+cos y+cos z

If sin^(-1)x +cos^(-1)y +sin^(-1)z=2pi then 2x-z+y is :

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

Prove the following: (i) ("sin" x+"sin" y)/(cos x+cos y)="tan""(x+y)/(2) (ii) (cos 7x+cos 5x)/("sin" 7x-"sin" 5x)=cot x .

If cos x + cos y + cos z =0 = sin + sin y +sin z then tan (x-y) =

7.Show that | [1, cos x-sin x, cos x+sin x], [1, cos y-sin y, cos y+sin y ],[1, cos z-sin z ,cos z+sin z ]|=2| [1 ,cos x, sin x], [1, cos y, sin y ],[1, cos z, sin z] |