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If tan9theta=3/4(where0ltthetaltpi/18)th...

If `tan9theta=3/4`(where`0ltthetaltpi/18`)then the value of `(3cosec 3theta-4sec3theta)` is equal to

A

3

B

4

C

5

D

10

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The correct Answer is:
D
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PATHFINDER-TRIGONOMETRIC RATIOS AND IDENTITIES-QUESTION BANK
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  2. If tanalpha and tanbeta be the roots of the equation (x^2+px+q=0) then...

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  3. If tan9theta=3/4(where0ltthetaltpi/18)then the value of (3cosec 3theta...

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  4. If A,B,C are interior angles of a triangle ABC such that (cosA+cosB+co...

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  5. If tantheta+sectheta=e^x then costheta equals

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  6. If lambda be the minimum value of , y=(sinx+cosecx)^2+(cosx+secx)^2+(t...

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  7. If (sqrt2cosx+sqrt2sinx+sqrt7)m=1 holds then

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  8. if costheta1+costheta2+costheta3=3then sin^2theta1+sin^4theta2+sin^6th...

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  9. If sintheta+cosectheta=2 then sin^ntheta+cosec^ntheta=

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  10. If tan(alpha/2) and tan(beta/2) are the roots of the equation 8x^2-26x...

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  11. 4sin^2x +4cos^2xgek then k is

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  12. If sin A,cos A and tan A are in G.P. then cos^3A+cos^2A is equal to

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  13. If x+1/x=2costheta then x^3+1/x^3=

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  14. If A=sin^2theta+cos^4theta then for all real values of theta

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  15. If sin A,cosA and tan A are in G.P. then cot^6A-cot^2A is equal to

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  16. The sign of the product (sin2)(sin3)(sin 5) is

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  17. No.of solution in the equation x=4 sinx when x in [0,2pi]

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  18. The value of sin 10^@+sin 20^@+sin30^@+…..+sin360^@ is equal to

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  19. if sin^4alphacos^2alpha=underset(k=0)overset3sum ckcos2kalpha then c1+...

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  20. The integer k for which the equation 7cosx+5sinx=2k+1 has a solution i...

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