$x = {-b \pm \sqrt{b^2-4ac} \over 2a}$ using this solve the equation .

9x^2+2x+8=0.

Find the value of integration:

$\int\frac{sinx+1}{1-cosx}dx$

Evaluate the  integration

$\int\frac{sinx+2x+1}{cosx+4x+2}dx$

Curie is the unit of_____?

Who was the inventor of Radar?

Solar radiation is measured by_____?

Relative humidity is measured by____?

Transformer is used____?

Who developed the atom bomb?

Who was the inventor of telescope?