In triangle `A B C ,` if `cotA *cotC=1/2a n dcot B* cotC=1/(18),` then the value of `tanC` is

In triangle A B C ,tanA+tanB+tanC=6a n dtanAtanB=2, then the values of tanA ,tanB ,tanC are, respectively (a)1,2,3 (b) 3,2//3,7//3 (c)4,1//2 ,3//2 (d) none of these

In a triangle ABC, if cotA :cotB :cotC = 30: 19 : 6 then the sides a, b, c are

If triangleABC , if cot A+cotB+cotC=0 then find the value of cos A cos B cos C .

In an acute angled triangle ABC, if tan(A+B-C)=1 and ,sec(B+C-A)=2, find the value of A,B and C.

In a triangle A+B+C=90 then prove that cotA+cotB+cotC=cotAcotBcotC

In a triangle ABC, let AB=sqrt23, BC=3 and CA =4 . Then the value of (cotA+cotC)/cotB is