The mean of 16 numbers is 8 .if 2 is added to each number ,then what will be the new mean
If lines PQ,PR,PS and PT are parellel to a line l, what can be said about the points P,Q,R,S,T
A girl of height 90 cm is walking away from the base of lamp post at a speed of 1.2 m/s. If the lamp is 3.6m above the ground, find the length of her shadow after 4 seconds.
if sin theta+sin ka square =1,prove that cos ka square +cos ke power 4 theta =1