In triangle ABC, the line joining the circumcenter and incenter is parallel to side AC, then `cos A + cos C` is equal to

In a triangle ABC,the line joining the circumcentre and incentre is parallel to BC, then cos B+cos C is equal to:

In triangle ABC, line joining the circumcenter and orthocenter is parallel to side AC, then the value of tan A tan C is equal to

In triangle ABC,line joining the circumcenter and orthocentre is parallel to side AC,then the value of tan A tan C is equal to sqrt(3)(b)3(c)3sqrt(3)(d) none of these

In triangle ABC if the line joining incenter to the circumcenter is parallel to the base BC, then the value of (cosB + cosC-1) is equal to

The sides of a triangle are in A.P. then the line joining the centroid to the incentre is parallel to (a)The largest side (b) The smaller side (C)The middle side (d)None of the sides

If I is the incenter of a triangle ABC,then the ratio IA IB IC is equal to

The line joining the midpoints of any two sides of a triangle is parallel to 3rd side and equal to half of it

The line joining the mid-points of two sides of a triangle is parallel to the third side.

In a Delta ABC(bc sin^(2)A)/(cos A+cos B cos C) is equal to