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If x\ costheta=y cos(theta+(2pi)/3)=z co...

If `x\ costheta=y cos(theta+(2pi)/3)=z cos(theta+(4pi)/3)` , then write the value of `1/x+1/y+1/zdot`

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RD SHARMA ENGLISH-TRIGONOMETRIC RATIOS OF COMPOUND ANGLES-All Questions
  1. . Show that sin100^@- sin 10^@ is positive

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  2. If alpha+beta-gamma=pi and sin^2alpha+sin^2beta-sin^2gamma=lambda sina...

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  3. If x\ costheta=y cos(theta+(2pi)/3)=z cos(theta+(4pi)/3) , then write ...

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  4. Write the maximum and minimum values of 3cos x+4sin x+5.

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  5. Write the maximum value of 12sinθ.

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  6. If 12 sintheta-9sin^2theta attains its maximum value at theta=alpha , ...

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  7. Write the interval in which the values of 5costheta+3cos(theta+pi/3)+3...

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  8. If tan(A+B)=p\ a n dtan(A-B)=q then write the value of tan2Bdot

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  9. If ("cos"(x-y))/("cos"(x+y))=m/n , then write the value of t a n x\ t ...

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  10. If a=b cos((2pi)/3)= c cos((4pi)/3), then write the value of a b+b c+c...

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  11. If A+B=C , then write the value of t a n A\ t a n B\ t a n Cdot

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  12. If sinalpha-sinbeta=a and cosalpha+cosbeta=b then write the value of "...

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  13. The value of sin^2 75^0-sin^2 15^0 is a. 1//2 b. sqrt(3)//2 c. 1 d. 0

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  14. If A+B+C=180^0,\ then s e c A(cos B cos C-sin B sin C) is equal to:

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  15. tan20^@+tan40^@+sqrt3 tan20^@ tan40^@= (a).sqrt3/4 (b).sqrt3/2 (c).s...

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  16. If tanA=a/(a+1) and tanB=1/(2a+1) then the value of A+B is: (a).0...

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  17. If 3sintheta+4costheta =5 then find the value of: 4sintheta-3costheta

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  18. The value of: tan3A-tan2A-tanA =

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  19. If A+B+C=180^0 , then (t a n A+t a n B+t a n C)/(t a n A\ t a n B\ t a...

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  20. If cosP=1/7a n d\ cos Q=(13)/(14)w h e r e\ P\ a n d\ Q both are acute...

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