" 30.If a,"c,b" are in A.P.,then : a ".cos B-b*cos A=

if a, b,c are in A.P. then b =

In a triangleABC , if a,c,b are in A.P. then the value of (a cos B-b cos A)/(a-b) , is

In a triangleABC , if a,c,b are in A.P. then the value of (a cos B-b cos A)/(a-b) , is

If A,B,C are in A.P then (sin A-sin C)/(cos C-cos A)=

If a^(2), b^(2), c^(2) are in A.P., then : (cos A)/a, (cos B)/b, (cos C)/c are in

If A,B,C are in A.P., then correct relation is cot A=(sin B+sin C)/(cos C+sin B)

In Delta ABC, if tan ""(A)/(2), tan""(B)/(2) , tan""(C)/(2) are in A.P. then cos A , cos B , cos C are in

If A , B , C are in A.P. then (sin A-sin C)/(cos C-cos A)= adot t a n B b. cot B c. t a n2B d. none of these

If A ,\ B ,\ C are in A.P. then (sin A-sin C)/(cos C-cos A)= adot\ t a n B b. cot B c. t a n2B d. none of these