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The value of (tan 9^(@)-tan 27^(@)-tan 6...

The value of `(tan 9^(@)-tan 27^(@)-tan 63^(@)+tan 81^(@))` is-

A

`-1`

B

1

C

2

D

4

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The correct Answer is:
D
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CHHAYA PUBLICATION-MCQ's-QUESTION PAPER 2
  1. The value of tan 31^(@) tan 32^(@)tan 33^(@)…tan 59^(@) is-

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  2. In a triangle ABC, if 3a = b+c, then the value of cot ""(B)/(2) cot ""...

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  3. The value of (tan 9^(@)-tan 27^(@)-tan 63^(@)+tan 81^(@)) is-

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  4. The number of intergral roots of the equation e ^(x-8)+2x -17 =0 is -

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  5. The sum of the coefficients in the expansion of (1+x- 3x ^(2))^(100) ...

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  6. The locus of the point z satisfying are ((z-1)/(z+1))=k (where I is no...

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  7. Total numbe of four digit odd numbers that can be formed using the di...

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  8. The number of diagonals of a polyogn of 20 sides is-

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  9. 10^(n) +3.4 ^(n+2)+5 is always divisible by (for all n in N)-

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  10. If a,b,c are in A. P. then a/(bc), 1/c, 2/b will be in-

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  11. If omega is an imaginary cube root of unity, then the value of (1+ ome...

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  12. The roots of the equation x^(2)-(1-2i) x-2i =0 are -

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  13. State which of the following is not true:

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  14. A die is thrown. If the shows six, we drawna ball from a bag contining...

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  15. The mean deviation about of the set of numbers 7,9,24,14 and 26 is-

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  16. If S(n) =nP +1/2 n (n-1) Q, where S(n) is the sum of first n terms of ...

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  17. In n parallel lines in a plane are intersected by a family of m parall...

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  18. If 0 le x le 1, then the minimum value of (x^(2) +x+1)is-

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  19. How many terms are there in the expansion of (4x+7y)^(10) +(4x-7y)^(10...

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  20. If u(1) =sqrt2, u(2) =sqrt(2sqrt(2)), u(3) =sqrt(2sqrt(2sqrt2)),... th...

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