Question

If 2k 1, 6,3k 1 are in ap find the value of K 

A marble tile measure 20 CM by 15cm. How many tiles will be required to cover a wall of size 5m by 3m? 

Video required for example 19

I can join the premium course but How to provide the practically work in accounting and taxation?

Where did (2n-1)! Go

Degree measure of 11/16

In the adjoining figure if BC=12 cm & ar (EBC) =120 cm.find the areas of parallelogram ABCD , BCEF & also the length of altitude A on BC

if we do it this way the points are coming wrong how is this possible

ABCD is a parallelogram. The circle through A,B and C intersect CD (produced if necessary) at E. prove that AE=AD. 

if cosa-sina=√2sina prove that cosa+sina=√2cosa

Last step of sum explain in detail

find the area of quradnate of a circle whose circumference is 44 cm

What is basics of debtor? 

A hollow cone is cut by a parallel to the base and upper portion is removed.if the curved surface of the reminder is 8 of the curved 
                                               9
Surface of the whole cone,find the ratio of the line segments into which the cone's altitude is divided by the plane

Sir  my doubt is from 1.1 exercise from question no.*2   *3...and questionno.*5....

while checking a relation is reflexive symmetric transitive why we are everytime proving it not reflexive  not symmetric not transitive . I have a doubt why we are always proving that it is not equivalence why we are not proving it as equivalence.
Sir I've seen in many questions like ... whenever such type of questions come like .. show that or check whether the relation is reflexive..symmetric.or transitive....
We are always proving that question is neither reflexive nor transitive or symmetric......

If sin ( cot inverse (x+1) )= cos ( tan inverse x)  then find x 

Two parallel sides DC and AB  of a trapezium are 12cm and 36cm respectively. If non parallel sides are each equal to 15cm, find the area of the trapezium