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Which of the following number (s) is/are...

Which of the following number (s) is/are rational?

A

`sin 15^@`

B

`cos 15^@`

C

`sin 15^@ cos 15^@`

D

`sin 15^@ cos75^@`

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Which of the following numbers is/are rational?

Which one of the following number (s) is/are rational?

Which of the following number(s) is rational? (A) sin15^(@)(B)cos15^(@)(C)sin15^(@)cos15^(@) ( textrmD ) sin15^(@)cos75^(@)

KVPY PREVIOUS YEAR-MOCK TEST 1-EXERCISE
  1. The locus of the centre of a circle,which touches the circles|z-z1|=a ...

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  2. Which of the following number (s) is/are rational?

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  3. From a fixed point A on the circumference of a circle of radius r , th...

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  4. Letf:RrarrR be a function defined by f(x)=min {x+1,|x|+1}, then which ...

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  5. Let f:RR to RR,g:RR to RR and h:RR to RR be differentiable functions s...

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  6. Two points P and Q are taken on the line joining the points A (0.0) an...

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  7. Let P={theta:sintheta-costheta=sqrt2costheta}and Q={theta: sintheta+co...

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  8. If the focus of the parabola (y - k)^2 = 4(x - h) always lies between ...

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  9. Let us define a region R is xy-plane as a set of points (x,y) satisfy...

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  10. The chance that doctor A will diagnose disease X correctly is 60%.The ...

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  11. Let f:{x,y,z}rarr{1,2,3} be a one-one mapping such that only one of th...

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  12. For hyperbola x^2/(cos^2alpha)-y^2/(sin^2alpha)=1which of the followin...

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  13. The equation 2cos^2x/2sin^2x=x^2+x^(-2);0<xlt=pi/2 has no real solutio...

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  14. The value of int(pi)^(2pi)[2sinx]dx where [.] represents the greatest ...

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  15. If f(x)=x^3+3x^2+6x+2sinx then the equation 1/(x-f(1))+2/(x-f(2))+3/(x...

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  16. If f and g are two continuous functions being even and and odd, respec...

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  17. A determinant of the second order is made with the elements 0 and 1. I...

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  18. Let f:[0,oo)vec[0,oo)a n dg:[0,oo)vec[0,oo) be non-increasing and non-...

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  19. The number of such points (a+1,sqrt3a), where a is any integer, lying...

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  20. Ifx^4+px^3+qx^2+rx+5=0 has four positive roots,then the minimum value ...

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