sin alpha+sin beta+sin y-sin(alpha+beta+y)=4sin((alpha+beta)/(2))sin

Prove that: sin alpha+sin beta+sin gamma-sin(alpha+beta+gamma)=4sin((alpha+beta)/(2))*sin((beta+gamma)/(2))*sin((gamma+alpha)/(2))

Prove that: sin alpha+sin beta+sin gamma-sin(alpha+beta+gamma)=4sin((alpha+beta)/(2))sin((beta+gamma)/(2))sin((gamma+alpha)/(2))

Prove that (cos alpha-cos beta)^2+(sin alpha-sin beta)^2=4sin^2((alpha-beta)/2)

(i) sin (alpha + beta) = sin alpha cos beta + cos alpha sin beta) (ii) sin (alpha-beta)= sin alpha cos beta- cos alpha sin beta Proof

Evaluate: quad =|cos alpha cos beta cos alpha sin beta-sin alpha-sin beta cos beta0sin alpha cos beta sin alpha sin beta cos alpha|

Prove the following: "sin" alpha+"sin" beta+"sin" gamma-"sin"(alpha+beta+gamma)=4"sin"(alpha+beta)/(2)"sin"(beta+gamma)/(2)"sin"(gamma+alpha)/(2)

What is sin (alpha+beta) - 2 sin alpha cos beta + sin(alpha- beta) =

Prove the following : sin alpha+ sin beta+ sin gamma - sin (alpha+beta+gamma)= 4sin frac (alpha+beta)(2) sin frac (beta+gamma)(2) sin frac (gamma+alpha)(2) .

Evaluate ,,,|cos alpha cos beta,cos alpha sin beta,-sin alpha-sin beta,cos beta,0sin alpha,cos beta,sin alpha sin beta,cos alpha]|