Express 5- square root of 3 i/4+2 square root of 3. in a+ib form

O is any pont outside a rectangle abcd prove that ob^2 +od^2= oa^2+ oc^2.

O is any pont outside a rectangle abcd prove that ob^2 +od^2= oa^2+ oc^2.

if (x)=2x/1+x2 ,then find the value of  f(tan bie/6)

i want the solution

what is accural

gst

Explain the rough work 

Find the area of shaded area when two circles which touch at A. O is the centre of bigger circle .if cb= 9 cm, ED= 5cm. Find the area of shaded area .