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(cos^(3)theta-cos3theta)/(costheta)+(sin...

`(cos^(3)theta-cos3theta)/(costheta)+(sin^(3)theta+sin3theta)/(sintheta)=`

A

3

B

6

C

9

D

0

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The correct Answer is:
A
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AAKASH SERIES-MULTIPLE & SUBMULTIPLE ANGLES-EXERCISE-1
  1. (3costheta+cos3theta)/(3sintheta-sin3theta)=

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  2. (cos3theta)/(2cos2theta-1)=

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  3. (cos^(3)theta-cos3theta)/(costheta)+(sin^(3)theta+sin3theta)/(sintheta...

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  4. (sin^(3)theta+sin3theta)/(cos^(3)theta-cos3theta)

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  5. (sin^(2)3A)/(sin^(2)A)-(cos^(2) 3A)/(cos^(2)A)=

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  6. If thetalt22 1^(@)/2 then sqrt(2+sqrt(2+sqrt(2+2cos4theta)))=

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  7. ( cos 2 alpha)/( cos^(4) alpha - sin^(4) alpha ) -(cos^(4) alpha + si...

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  8. If x=sqrt((1- cos theta )/(1+ cos theta )), " then " (2 x)/(1-x^(2))=

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  9. IF x^2+y^2=1 and P=(3x-4x^3)^2+(3y-4y^3)^2 then find 'P'.

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  10. IF y=(tan(pi/4+theta)+tan(pi/4-theta))/(tan(pi/4+theta)-tan(pi/4-theta...

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  11. (tan^(2)2theta-tan^(2)theta)/(1-tan^(2)2thetatan^(2)theta)=

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  12. The value of (2 sinx)/(sin3x) +(tanx)/(tan3x) is .

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  13. If A and B are acute angles and sinA=1/(5sqrt2) and tanB=1/3 then A+2B...

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  14. If sinalpha=3//5 and 90^(@)ltalphalt180^(@) then cos3alpha=

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  15. If sin(alpha+beta)=1 and sin(alpha-beta)=1/2 where alpha,beta in [0,pi...

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  16. If costheta=-3/5 and 180^(@)ltthetalt270^(@) then "tan"theta/2=

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  17. 3 cos72^(@)-4" sin"18^(@)=

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  18. 3sin6^(@)-4cos^(3)84^(@)=

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  19. cos^(2)""(3pi)/(5)+cos^(2)""(4pi)/(5)=

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  20. If A+B=60^(@) then cos^(2)A+cos^(2)B-cosA cosB=

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