Question

1. Superb .
2. thank u . 
3. Give the concepts of iit 11th and 12 th .and some question and answers for iit sums.😊😊
   

A sphere with centre O sits atop a pole. An observer on the ground is at a distance of 50mfrom the foot of the pole. She notes the angle of elivation from the observer point P and Q on the sphere is 30 degree and 60 degree respectively find radius of sphere

Please provide optional exercise solutions of surface area and volume, class-10

prove that if x greater than or equal to 1/2 and x less than or equal to 1 ,cos inverse x +cos inverse ( x/2 +underroot (3-3x square) /2 =180/3

      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

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.