Range of tan^-1 x is

Circumcenter of a circle is the point if intersection of the:

In triangle ABC, if one side 'C' and two angles α,βare given then Area=

In triangle ABC, If vertex A is at origin then the law of cosine is:

sin(α+β)-sin(α-β)=

2 sin 45°+ cosec 45° =

In expansion of the Binomial Theorem, the General Term is:

The number of diagonals of a six-sided figure is

The sum of infinite G.P. 2, √21... Is

A.M. between √2 and 3√2 is

A rational fraction in which degree of P(x) is less than the degree of Q(x) is called:

If b²-4ac=0, then the roots of the equation are:

The sum of cube roots of unity is

If A = [a_ij ] _m×n is a square matrix, and A^t = -A then A is =

The system of linear equations has unique solution if:

If S = {1, -1, ι, -ι} then set 'S' is an abelian group with respect to:

If a complex number z = 1 - ι√3 then |z|=