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If tan a=2/sqrt13, then the value of (co...

If `tan a=2/sqrt13`, then the value of `(cosec^2 a+2sec^2 a)/(cosec^2 a-3 sec^2 a)` is :
यदि `tan a=2/sqrt13`,है, तो `(cosec^2 a+2sec^2 a)/(cosec^2 a-3 sec^2 a)` का मान:

A

21

B

14

C

32

D

16

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PINNACLE-TRIGONOMETRY-EXERCISE
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  5. (tan A+tan B-tan C+tan A tan B tan C)/(1-tan A tan B+tan B tan C+tan C...

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  7. If (sin x + cos x)/(sin x - cos x) = (6)/(5) , then the value of (ta...

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  8. If sin x = (3)/(5), 0 le x le 90^(@), then the value of cot x.sec x...

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  9. If 2 cot theta =3, then (sqrt13 Cos theta -3tan theta )/(3tan theta + ...

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  10. If 2x= sin theta and 2/x=cos theta , then the value of 4(x^2+1/x^2) i...

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  11. If x = tan40^@, then the value of 2tan 50^@ will be: यदि x = tan40^@...

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  12. (sqrt(Cosecx-1))/(sqrt(Cosecx+1)) is equal to: (sqrt(Cosecx-1))/ (sq...

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  13. The value of (Cos29^@ cosec61^@ tan45^@+2sin35^@ sec55^@)/(3sin^2 42^@...

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  14. If x sin30^@ cos60^@= sin45^@. cos45^@, then the value of x is: यदि ...

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  15. The value of (cosec^2 30^@ sin^2 45^@ +sec^2 60^@)/(tan60^@ cosec^2 45...

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  16. cos A(sec A-cos A)(cot A+tan A) =?

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  17. If sin 3A=cos(A+10), where 3A is an acute angle, then what is the valu...

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  18. (1/(cos theta)-1/(sin theta))+1/(cosec theta-cot theta)-1/(sec thet...

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  19. In triangle PQR, angle Q=90^@, If cot R=1/3, then what is the value o...

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  20. If sec theta= a/b, b ne 0, then (1-tan^2 theta)/(2-sin^2 theta)= ? य...

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