If `(a,1/a), (b.1/b) , ( c,1/c) , (d , 1/d)` are four distinct points on a circle of radius 4 units then, `abcd` is equal to:

If (a,(1)/(a)),(b,(1)/(b)),(c,(1)/(c))o*(d,(1)/(d)) are four distinct points on a circle of radius 4 units,then abcd is equal to (A) 4(B)16 (C) 1 (D) 2

A ,\ B ,\ C ,\ D are four consecutive points on a circle such that A B=C Ddot Prove that A C=B D

If a, b, c, d are four distinct numbers in A.P. , show that 1/a + 1/d gt 1/b + 1/c gt 4/(a + d)

If a+1=b+2=c+3=d+4=a+b+c+d+5, then (a+b+c+d) is equal to

Points A(3, 1), B(5,1), C(a,b) and D(4,3) are vertices of a parallelogram ABCD. Find the values of a and b.

Points A(3, 1), B(5, 1), C(a, b) and D(4, 3) are vertices of a parallelogram ABCD. Find the values of a and b.

If (x/a)+(y/b)=1 and (x/c)+(y/d)=1 intersect the axes at four concylic points and a^2+c^2=b^2+d^2, then these lines can intersect at, (a , b , c , d >0) (1,1) (b) (1,-1) (2,-2) (d) (3,3)

If a,b,c and d are four positive real numbers such that abcd =1, what is the minimum value of (1+a)(1+b)(1+c)(1+d)