a 6² where a and b are two distinct numbers such that ab > 0. 10.cos 0 - 2 ab

costheta=(a^(2)+b^(2))/(2ab) , where a and b are two distinct numbers such that ab gt 0 .

costheta=(a^(2)+b^(2))/(2ab) , where a and b are two distinct numbers such that ab gt 0 .

If alpha " and " beta are two distinct roots of a cos theta + b sin theta = c , prove that sin (alpha + beta) = (2ab)/(a^(2)+b^(2))

The equation ax^(2) + bx + c = 0 , where a, b,c are real number connected by the relation 4a + 2b + c = 0 and ab lt 0 and ab lt 0 has :

Let {a_n} , be a sequence of distinct real numbers, then among any five distinct terms there are two a and b, such that |ab+1| > |a-b| .

Let a and b be two distinct roots of the equation x^(3)+3x^(2)-1=0 The equation which has (ab) as its root is

Let A=[(2,3),(5,7)] and B=[(a, 0), (0, b)] where a, b in N . The number of matrices B such that AB=BA , is equal to

Let A=[(2,3),(5,7)] and B=[(a, 0), (0, b)] where a, b in N . The number of matrices B such that AB=BA , is equal to