Question

Let R be the relation on the set N of natural numbers defined by R={(a,b):a+3b=12,a,bEN}

Please help me with this

Bank a/c is a personal a/c or a real a/c?

A cone of height 24cm and radius of base 6cm is made of modelling clay. A child reshapes it in form of a sphere . Find radius of sphere

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