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If ABCD, is a cycling quadrilateral such...

If ABCD, is a cycling quadrilateral such that `tanA-5=0and 5cosB+3=0,` then the quadratic equation whose roots are `cosCand tan D,` is

A

`39x^(2)-16x-48=0`

B

`39x^(2)+88x-48=0`

C

`39x^(2)-88x-48=0`

D

none of these

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A
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OBJECTIVE RD SHARMA-TRIGONOMETRIC RATIOS AND IDENTITIES-Exercise
  1. If sinx+sin^2x=1, then find the value of cos^(12)x +3cos^(10)x + 3 cos...

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  2. If ABCD is a cyclic quadrilateral, then the value of cosA-cosB+cosC-co...

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  3. If ABCD, is a cycling quadrilateral such that tanA-5=0and 5cosB+3=0, t...

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  4. If sin (picot theta)=cos (pi tantheta), then

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  5. The value of sinx siny sin(x-y)+sinysinz sin(y-z) +sinz sinx sin(z-x)+...

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  6. If ABCD is a convex quadrilateral such that 4 sec A+5 =0 then the quad...

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  7. If (tanalpha+tanbeta)/(cot alpha+cot beta)+{cos(alpha-beta)+1}^(-1)=1,...

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  8. cos(pi/15)cos((2pi)/15)cos((3pi)/15)cos((4pi)/15)cos((5pi)/15)cos((6pi...

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  9. The value of cos12^(@)cos24^(@)cos36^(@)cos48^(@)cos72^(@)cos84^(@), i...

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  10. The value of sin""(15pi)/(32)sin""(7pi)/(16)sin""(3pi)/(8), is

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  11. sum(r=1)^(n-1)cos^(2)""(rpi)/(n) is equal to

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  12. The value of cot theta-tantheta-2tan2theta-4tan4theta-8cot8theta, is

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  13. If cos(x-y), cosx and cos(x+y) are in H.P., then cos x sec (y/2) equal...

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  14. The value of tan20^(@)+2 tan50^(@)-tan70^(@), is

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  15. If cosA+cosB+cosC=0, then cos3A+cos3B+cos3C is equal to

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  16. Minimum value of cos2theta+costheta for all real value of theta is

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  17. cos9^@-sin9^@=

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  18. If y=(sin 3theta)/(sintheta), theta nen pi, then

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  19. If tan(picostheta)=cot(pisintheta),0lt thetalt(3pi)/(4), then sin(thet...

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  20. If tan(picostheta)=cot(pisintheta),"then the value of"sin(theta+(pi)/(...

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