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question .no.11

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tan^-1[2cos(2sin^-1 1/2)]

FIND THE RADIUS OF THE CIRCLE WHOSE AREA IS EQUAL TO THE SUM OF THE AREAS OF TWO CIRCLES OF RADII 12 cm AND 5cm

Let P(C) be the power set of C. A binary operation* is defined on P(C) such that A*B=(A-B) union (B-A). Prove that phi is the identity element and A is invertible for all A belongs to P(C)

A patient in hospital is giving soft idly in a cylindrical pipe of diameter 7 centimetre if the bowl is filled with soap Tu Hi height of force admit I'm how much Sab the hospital has to prepare Delhi to serve 250 patients

• 18th term of A.P .underroot2,3, root2,5 root2