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For which acute angle theta cosec^2 thet...

For which acute angle `theta` `cosec^2 theta= 3 sqrt3 cot theta-5`?

A

`5 pi//12`

B

`pi//3`

C

`pi//6`

D

`pi//4`.

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MODERN PUBLICATION-TRIGNOMETRY-EXERCISE
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  2. What is the value of tan (-1575^@) ?

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  3. For which acute angle theta cosec^2 theta= 3 sqrt3 cot theta-5?

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  4. If tan^2 theta=2 tan^2 phi+1, then which of the following is correct ?

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  5. The value of sin 10^(@) sin 50^(@) sin 70^(@) is equal to

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  10. In sinA= 1/sqrt5, cosB= 3/sqrt10, A, B being positive acute angles, th...

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  11. x = sin theta cos theta, and y = sin theta +cos theta are satisfied by...

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  12. A man observes the elevation of a balloon to be 30^@. He then walks 1 ...

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  13. The number of integral values of k for which the equation 7 cos x + 5 ...

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  14. In a triangle ABC, 2ca sin frac(A-B+C)(2)=

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  15. The period of sin^2 theta is :

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  16. If y = sec^2 theta+ cos^2 theta, theta ne 0, then :

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  17. If alpha is a root of 25 cos^2 theta+ 5 cos theta- 12 = 0,pi/2 < alpha...

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  19. In a triangle ABC, tan frac (A)(2)=5/6, tan frac (C)(2)=2/5, then :

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