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If the complex numbers is (1+ri)^(3)=lam...

If the complex numbers is `(1+ri)^(3)=lambda(1+i)`, when `i=sqrt(-1)`, for some real `lambda`, the value of r can be

A

`cosfrac(pi)(5)`

B

`cosecfrac(3pi)(2)`

C

`cosfrac(pi)(12)`

D

`cosecfrac(pi)(12)`

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KVPY PREVIOUS YEAR-MOCK TEST 5-EXERCISE
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  2. A quadrilateral is inscribed in a parabola, then which of the followin...

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  3. Let [a] denotes the larger integer not exceeding the real number a if ...

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  4. The number of solution of the equation sin^(3)x cos x+sin^(2)x cos^(2)...

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  5. The solution set of the inequality |9^x-3^(x+1) + 15| < 2.9^x - 3^x i...

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  6. Let R be the relation in the set Z of all integers defined by R= {(x,y...

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  7. If the integers m and n are chosen at random between 1 and 100, then t...

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  8. If the circumcenter of an acute-angled triangle lies at the origin ...

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  9. If f(x) = cospi(| x|+[x]), then choose the incorrect option.

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  10. the set of equations lambdax-y+(cos 0) z=0,3x+y+2z=0 (cos 0) x+y+2z...

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  11. The probability that the graph of y=16x^2 +8(a +5)x-7a-5=0, is strictl...

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  12. Let f:R->R and g:R->R be two one-one and onto functions such that they...

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  13. The value of a for which a x^2+sin^(-1)(x^2-2x+2)+cos^(-1)(x^2-2x+2)=1...

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  14. if the equation x^(4)-4x^(3)+ax^(2)+bx+1=0 has four positive roots, th...

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  15. If f(x)={(([x]-1)/(x-1), x ne 1),(0, x=1):} then f(x) is

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  16. Calculate the area bounded by the curve y=x(3-x)^2 the x-axis and the ...

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  17. If x , y, z in R, x + y + z= 4 and x^(2) + y^(2) + z^(2) = 6, then the...

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  18. the minimum value of 3tan^2theta+12cot^2theta is (A) 6 (B) 15 (C) 24 (...

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  19. If the range of the function f(x)=(x-1)/(p-x^2+1) does not contain any...

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  20. The int(tan^-1 alpha)^(cot^-1 alpha) (tanx)/(tanx+cotx)dx alpha in R c...

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