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If 2cos 3theta=1, then the value of thet...

If `2cos 3theta=1`, then the value of `theta` is

A

`(pi)/(3)pmpi`

B

`(pi)/(3),cos^(-1)(3//5)`

C

`cos^(-1)(3//5)pmpi`

D

`(pi)/(3),pi-cos^(-1)(3//5)`

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WB JEE PREVIOUS YEAR PAPER-QUESTION PAPER 2009-MULTIPLE CHOICE QUESTIONS
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  2. If ab = 2a +3b, a gt0, b gt 0, then the minimum value of ab is-

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  3. If 2cos 3theta=1, then the value of theta is

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  4. For any complex number z, the minimum value of |z|+|z-1| is

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  8. Find the sum of the following geometric series : 1+(1)/(4)+(1)/(16)+...

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  10. The domain of definition of the function f(x)=sqrt(1+log(e)(1-x)) is

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  11. The value of ["tan"^(-1)(m)/(n)-tan^(-1)((m-n)/(m+n))] is -

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  12. lim(xto2)(sin(e^(x-2)-1))/(log(x-1))

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  13. Let f(x)=(sqrt(x+3))/(x+1) then the value of Lt(xto-3-0)f(x) is

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  14. f(x)=x+|x| is continuous for

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  15. prove that tan((pi)/(4)+(1)/(2) cos ^(-1)""(a) /(b) )+tan ((pi)/(4) ...

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  16. If i=sqrt-1 and n is a positive integer, then i^(n)+i^(n+1)+i^(n+3 is ...

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  17. int(dx)/(x(x+1)) equals

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  18. If x is a positive real number different from 1 such that log(a)^(x),l...

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  19. A line through the point A (2,0) which makes an angle of 30^(@) with t...

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