SinA.Sin(A+B)

Prove that: sin(A+2B)sinA-sinBsin(2A+B)sinB=sin(A+B)sin(A-B)

(sin(A-C)+2sinA+sin(A+C))/(sin(B-C)+2sinB+sin(B+C)) is equal to

Prove that: (sin(A-C)+2sinA+sin(A+C))/(sin(B-C)+2sinB+sin(B+C))=(sinA)/(sinB)

Prove that: (sin(A-C)+2sinA+sin(A+C)) / ("sin"("B"-"C")+2sinB+"sin"(B+C)) = (sinA)/(sinB)

In a triangle ABC, which of the following quantities denote the area of the triangles (a^2-b^2)/2(sinA sinB)/(sin(A-B))

In any triangle A B C , prove that: (a^2sin(B-C))/(sinB+ sin C)+(b^2sin(C-A))/(sinC+ sin A)+(c^2sin(A-B))/(sinA+ sin B)=0

In triangle ABC prove that (i) sinA=sin(B+C)" "(ii) sin2A=-sin(2B+2C) (iii) cosA=-cos(A+B)" " (iv) tan((A+B)/2)=cot. C/2

Prove that: sinA.sin(60^(@)+A).sin(60^(@)-A)=1/4sin3A

Solve sinA.cos(A-B)-cosA.sin(A-B)

Show that: sinAsin(B-C)+sinB sin(C-A)+sinCsin(A-B)=0