Delta ABC,sum(cos(B-C))/(sin B sin C)=

In Delta ABC, sum""(cos (B-C))/(sinB sin C )=

In any Delta ABC, sum a(sin B - sin C) =

In any Delta ABC, sum a(sin B - sin C) =

In Delta ABC,sum(sin(B-C))/(bc)=

Assertion A:In/_ABC,sum(cos A)/(sin B sin C)=2 Reason R:In/_ABC,sin A+sin B+sin C=4(cos A)/(2)(cos B)/(2)(cos C)/(2)

In Delta ABC , sum a (sin B - sin C)

If in a Delta ABC, cos B = (sin A)/(2 sin C), then the triangle is

In any Delta ABC,sum a(sin B-sin C)=a^(2)+b^(2)+c^(2)(b)a^(2)(c)b^(2)(d)0

In Delta ABC,sum a^(3)sin(B-C)

In Delta ABC, (cos A)/(c sin B)+(cos B)/( a sin C)+(cos C)/( b sin A) =