sin(A+B).sin(A-B) is equal to

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

The value of cos ( 35^(@) + A)cos ( 35^(@) - B) + sin ( 35^(@) +A)sin ( 35^(@) - B) is equal to (i) sin(A+ B) (ii) sin(A - B) (iii) cos (A+B) (iv) cos(A-B)

If A+B+C=180^0,\ then s e c A(cos B cos C-sin B sin C) is equal to:

(sin2A+sin2B+sin2C)/(sinA+sinB +sinC) is equal to

Consider a triangle ABC, where c,y,z are the length of perpendicular drawn from the vertices of the triangle to the opposite sides a,b, c respectively. Let the letters R,r S,Delta denote the circumradius, inradius semi-perimeter and area of the triangle respectively. The valur of (c sin B+b sin C)/(x)+ (a sin C +c sin A)/(y)+(b sin A+a sin B)/(z) is equal to

If A, B, C are the angles of a triangle, then the determinant Delta = |(sin 2 A,sin C,sin B),(sin C,sin 2B,sin A),(sin B,sin A,sin 2 C)| is equal to

(sin^2A-sin^2B)/(sinAcosA-sinBcosB) is equal to (a) "tan"(A-B) (b) "tan"(A+B) cot(A-B) (d) cot(A+B)

(sin^2A-sin^2B)/(sinAcosA-sinBcosB) is equal to (a) tan(A-B) (b) "tan"(A+B) (c) cot(A-B) (d) cot(A+B)

In triangleABC , if ar (triangleABC)=8 . Then, a^(2)sin(2B)+ b^(2)sin(2A) is equal to

If sinB=1/5sin(2A+B), then (tan(A+B))/(tanA) is equal to