GRAPH OF FUNCTIONS

To draw the graph for any function, we need to take some positive and negative values of then find the corresponding values of And make the line or curve by joining the points obtained. (1) Straight Line . (2) Circle   where are co-ordinates of centre and is the radius of the circle. (3) Parabola […]

WHY sin x AND cosec x ARE POSITIVE IN SECOND QUADRANT?

जब भी मै बच्चो से पूछता हूँ कि sin x and cosec x, IInd quadrant में positive क्यों होता है? cos x and sec x, IVth में और tan x and cot x IIIrd में? हमेशा answer आता हैं, Sir, ALL SCHOOL TO COLLEGE OR ADD SUGAR TO COFFEE, etc. कुछ ही बच्चों को इसका […]

VENN DIAGRAM

The pictorial representation of sets is called Venn diagram. The universal set is represented by a rectangular region and its subsets by circles inside the rectangle. In the above given Venn diagram, and and .   Here,and . If, there is no common elements in A and B and both are subsets of universal set, […]