Assertion A: If `x=sin(alpha- beta) sin(gamma - delta),y= sin(beta -gamma) sin (alpha - delta), z=sin(gamma - alpha). Sin(beta-delta)` then `x+y+z=0` Reason R :`2sinAsinB=cos(A-B)+cos(A+B)`

Assertion A: If x = sin (alpha-beta) sin (gamma-delta), y = sin (beta-gamma) sin (alpha-delta), z = sin (gamma-alpha) * sin (beta-delta) then x + y + z = 0 Reason R: 2sin A sin B = cos (AB) + cos (A + B)

If cos (alpha + beta) sin (gamma + delta) = cos (alpha - beta) sin (gamma - delta) then:

cos (alpha + beta) cos gamma-cos (beta + gamma) cos alpha = sin beta sin (gamma-alpha)

sin (beta+ gamma- alpha) + sin (gamma+ alpha - beta) + sin (alpha + beta- gamma)- sin (alpha + beta + gamma)=

cos alpha sin (beta-gamma) + cos beta sin (gamma-alpha) + cos gamma sin (alpha-beta) =

If cos(alpha+beta)sin(gamma+delta)=cos(alpha-beta)*sin(gamma-delta) ,prove that :cot alpha*cot beta*cot alpha=cot delta

If (alpha+beta+gamma+delta)=pi then sum cos alpha cos beta-sum sin alpha sin beta=

If cos(alpha+beta)sin(gamma+delta)=cos(alpha-beta)sin(gamma-delta), prove that cot alpha cot beta cot gamma=cot delta

If cos(alpha+beta)sin(gamma +delta) = cos(alpha-beta)sin(gamma-delta) , then the value of cotalpha*cotbeta.cotgamma is :

If cos(alpha+beta)*sin(gamma+delta)=cos(alpha-beta)*sin(gamma-delta) prove that cot alpha cot beta cot gamma=cot delta