Let A and B denote the statements
`A:cos alpha+ cos beta+cos gamma=0`
`B:sin alpha+sin beta+singamma=0`
If `cos(beta-gamma)+cos(gamma-alpha)+cos(alpha-beta)=-(3)/(2)`, then

Let A and B denote the statements A : cos alpha + cos beta + cos gamma =0 B : sin alpha + siin beta + sin gamma = 0 If cos(beta - gamma) + cos (gamma -alpha) + cos (alpha -beta) = - (3)/(2) , then

Let A and B denote the statements A: "cos"alpha+"cos"beta+"cos"gamma=""0 B : "sin"alpha+"sin"beta+"sin"gamma=""0 If cos(beta-gamma)""+""cos(gamma-alpha)""+""cos(alpha-beta)""=""""-(3//2) , then (1) A is true and B is false (2) A is false and B is true (3) both A and B are true (4) both A and B are false

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

Prove that : cos^2 (beta-gamma) + cos^2 (gamma-alpha) + cos^2 (alpha-beta) =1+2cos (beta-gamma) cos (gamma-alpha) cos (alpha-beta) .

cos alphasin(beta-gamma)+cosbetasin(gamma-alpha)+cos gammasin(alpha-beta)=

If a=cos alpha+i sin alpha, b=cos beta+isin beta,c=cos gamma+i sin gamma and b/c+c/a+a/b=1, then cos(beta-gamma)+cos(gamma-alpha)+cos(alpha-beta)=

If cos alpha+cos beta+cos gamma=0=sin alpha+sin beta+sin gamma , then (sin3alpha+sin3beta+sin3gamma)/(sin(alpha+beta+gamma)) is equal to

The vector cos alpha cos beta hati + cos alpha sin beta hatj + sin alpha hatk is a

If cos^(-1) alpha + cos^(-1) beta + cos^(-1) gamma = 3pi , then alpha (beta + gamma) + beta(gamma + alpha) + gamma(alpha + beta) equal to

Prove that cosalpha+cosbeta+cosgamma+cos(alpha+beta+gamma)=4cos((alpha+beta)/2)cos((beta+gamma)/2)cos((gamma+alpha)/2)