Formula for area of sphere 

Ex.7.1que.7

If x=9-4underoot5, find the value of x^2+1/x^2

How do i get 1000 using 5 9s?

e^x (1-sinx)/1-cosx) dx

What is diagonals ?

solve the following using matrices.... 3x-y=6 , x-3z=7 ,2y+3z=0

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Karun sah

1. Who is the first person came in World?