The number of 15th roots of unity which are also the 25th root of unity is: 3           (b)  5          (c)  10          (d)  None of these

The product of all n^(th) root of unity is always

The number of real roots xcosx=1 in [0,2pi] (A) 1 (B) 2 (C) 3 (D) none of these

The number of real roots xcosx=1 in [0,2pi] (A) 1 (B) 2 (C) 3 (D) none of these

If omega is a cube root of unity, then omega^(3) = ……

Consider the quadratic equation x^2-mx+1=0 with two roots alpha and beta such that alpha + beta =m and alpha beta =1 The value of m for which both the roots of the equation are greater then unity re (A) [2,oo] (B) ]--oo,2] (C) [-2,2] (D) none of these

The number of roots of (1-tantheta)(1+sin2theta)=1+tanthetafortheta in [0,2pi] is 3 (b) 4 (c) 5 (d) none of these

Find the values of m for which roots of equation x^(2)-mx+1=0 are less than unity.

A root of unity is a complex number that is a solution to the equation, z^n=1 for some positive integer nNumber of roots of unity that are also the roots of the equation z^2+az+b=0 , for some integer a and b is

The set of all value of a for which one root of equation x^2-ax+1=0 is less than unity and other greater than unity (A) (-oo,2) (B) (2,oo) (C) (1,oo) (D) none of these

if 1,omega,omega^2 root of the unity then The roots of the equation (x-1)^3 + 8 = 0 are