Question
How many triangles are there in the figure ? 
prove that the coefficient of middle term in the expansion of(1+x)^2n is the same as the sum of coefficient of two middle term in the expansion of (1+x)^2n_1
- prove that the coefficient of middle term in the expansion of(1+x)^2n is the same as the sum of coefficient of two middle term in the expansion of (1+x)^2n_1
In trapezium ABCD,AB||DC and AD IS PRODUCED TO E, Such that<CDE=75°. Find the values of x, y and z.
Abc is a square having lengthy of side 20 unit taking the santre of the square oresion and x and y axis are parellel to ab and ad respectively find the coordinates of ab c and d
question 4
A pole 6 m high casts the shadow 2√3m long on the ground . then find the sun's elevation.