Question

Evaluate limit x aproches to 0 sin 4x/sin2x

Prove that nCr + nCr-1=n+1Cr

The student of Vidyalaya was asked to participate in a competition for making and decorating pen holders in the shape of cylinder with a base using cardboard each pen holder was to be a radius 3 cm and height of 10.5 centimetre the Vidyalay was to supply the computers with the cardboard if there were 35 competitors how much cardboard for required to be bought for the competition

DRAW A PERPENDICULAR TO A LINE L TAKE APOINT A ON THIS PERPENDICULAR SUCH THAT A IS 3 CM AWAY FROM THROUGH A DRAWA LINE M PARALLEL TO L.