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The number of roots of the equation z^15...

The number of roots of the equation `z^15=1` satisfying `abs(argz)ltpi/2` are

A

6

B

7

C

8

D

None of these

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The correct Answer is:
B
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PATHFINDER-COMPLEX NUMBER-QUESTION BANK
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  5. If 1, omega,omega^2 are the three cube roots of unity, then (1-omega+o...

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  6. If omega is the cube root of unity then cos[(omega^200+1/omega^200)pi+...

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  8. the area of the triangle formed by 1, omega, omega^2 where omega be th...

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  9. The value of i^100+i^101+i^102+i^103

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  10. If argzlt0, then arg(-z)-argz is equal to

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  11. If z1,z2 and z3,z4 are two pairs of conjugate complex numbers, then ar...

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  12. The common roots of the equations z^3+2z^2+2z+1=0 and z^1985+z^100+1=0...

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  13. abs(z-6)ltabs(z-2) its solution is given by

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  15. If xr=cos(pi/2^r)+isin(pi/2^r) then x1x2x3.......infty=

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  19. If n is a positive integer, then, (1+isqrt3)^n+(1-isqrt3)^n=

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