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If mtan(theta-30^(@))=ntan(theta+120^(@)...

If `mtan(theta-30^(@))=ntan(theta+120^(@))`, then `(m+n)/(m-n)=?`

A

`2cos2theta`

B

`cos2theta`

C

`2sin2theta`

D

`sin2theta`

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The correct Answer is:
A, B, C
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ADVANCED MATHS BY ABHINAY MATHS ENGLISH-TRIGONOMETRY -EXERCISES (Multiple Choice Questions)
  1. cos24^(@)+cos55^(@)+cos125^(@)+cos204^(@)+cos300^(@)=?

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  2. (2sinthetatantheta(1-tantheta)+2sinthetasec^(2)theta)/((1+tantheta)^(2...

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  3. If mtan(theta-30^(@))=ntan(theta+120^(@)), then (m+n)/(m-n)=?

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  4. cosA+cos(240^(@)+A)+cos(240^(@)-A)=?

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  5. 1+cos56^(@)+cos58^(@)-cos66^(@)=?

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  6. If A+B=225^(@), then (tanA)/(1-tanA).(tanB)/(1-tanB)=?

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  7. If tantheta=(xsinphi)/(1-xcosphi)&tanphi=(ysintheta)/(1-ycostheta), th...

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  8. If tanx=(b)/(a), then find the value of sqrt((a+b)/( a-b ))+sqrt((a-b)...

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  9. If cos(A+B)=alphacosAcosB+betasinAsinB, then (alpha,beta)=?

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  10. tanalpha+2tan2alpha+4tan4alpha+8cot8alpha=?

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  11. The greatest value of cos^(2)((pi)/(3)-x)-cos^(2)((pi)/(3)+x) is

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  12. (sqrt(1+sinx)+sqrt(1-sinx))/(sqrt(1+sinx)-sqrt(1-sinx))=? (x is in IV ...

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  13. If sin A = n sin B then (n-1)/(n+1) tan (A+B)/(2) is equal to

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  14. (sin^(2)A-sin^(2)B)/(sinAcosA-sinBcosB)=?

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  15. If cosA=mcosB, then

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  16. If xcostheta=ycos(theta+(2pi)/(3))=zcos(theta+(4pi)/(3)), then (1)/(x)...

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  17. 2sinAcos^(3)A-2sin^(3)AcosA=?

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  18. <b>(i) tanA+tan(180^(@)+A)+cot(90^(@)+A)+cot(360^(@)-A)=?</b> (a) 0 ...

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  19. (sin3theta+sin5theta+sin7theta+sin9theta)/(cos3theta+cos5theta+cos7the...

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  20. If ABCD is a cyclic quadrilateral then cos A + cos B + cos C + cos D ...

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