[" If "2sin x+5cos y+7sin2=10],[" uen "7tan(x)/(2)+4cos y-6cos z=]

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 =

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 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

(sin x - sin y)/( cos x + cos y) = tan ""(x-y)/(2)

(sin x - sin y)/( cos x + cos y) = tan ""(x-y)/(2)

(sin x - sin y)/( cos x + cos y) = tan ""(x-y)/(2)

(sin x - sin y)/( cos x + cos y) = tan ""(x-y)/(2)

(sin x - sin y)/( cos x + cos y) = tan ""(x-y)/(2)