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The values of sqrt(3)cosec20^@-sec20^@is...

The values of `sqrt(3)cosec20^@-sec20^@`is equal to

A

a)`(4sin20^@)/(sin40^@)`

B

b)`(2sin20^@)/(sin40^@)`

C

c)4

D

d)2

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UNITED BOOK HOUSE-NAVA NALANDA-EXERCISE
  1. IF x and be are real numbers and b>0,|x|>b then

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  2. If z1 and z2 are any two complex numbers,then which of the following i...

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  3. The values of sqrt(3)cosec20^@-sec20^@is equal to

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  4. The intercept cut off by a line from y-axis is twice that from x-axis ...

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  5. Number of diagonals of a convex hexagon is

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  6. If A and B are any two events having P(AcupB)=1//2and P(barA)=2/3,then...

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  7. Standard deviation of first 10 natural numbers is

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  8. For any two sets, show that (A cap B) cup (A - B)= A.

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  9. Let X={0,-1,1,2,-2}and Y={0,1,2,3,4,6}f:XrarrYbe defined as f(x)=x^2+x...

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  10. Prove that sinx+siny+sinz-sin(x+y+z)=4sin((x+y)/2)sin((y+z)/2)sin((z+x...

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  11. Prove that sin (pi/14)sin((3pi)/14)sin((5pi)/14)=1/8

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  12. Solve :|z|=z+bar(1-2i)

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  13. In how many of the distinct permutaions of the letters in MISSISIPPI d...

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  14. Solve :x^2-(3sqrt2-2i)x-6sqrt2i=0

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  15. For any complex number z,prove that |Re(z)|+|Im(z)|le\sqrt 2 |z|

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  16. Find the direction in which a straight line must be drawn through the ...

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  17. Find the area of the triangle formed by the lines joingn the vertex of...

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  18. Find the domain of definition of the function f(x)=1/(ln(1-x))+sqrt(x+...

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  19. Prove that (AcupB)^c=A^c capB^c[without venn-diagram]

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  20. Four digit number are formed by using the digits 1,2,3,4 and 5 wihout ...

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