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The value of F(x)=6cosxsqrt(1+tan^2x) + ...

The value of `F(x)=6cosxsqrt(1+tan^2x) + 2sinxsqrt(1+cot^2x)` where `x in (0,2pi)-{pi,pi/2,(3pi)/2}` may be

A

4

B

`-4`

C

8

D

`-8`

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A, B, C, D
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  1. If x=secphi-tanphi and y=cosecphi+cotphi then

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  2. The value of F(x)=6cosxsqrt(1+tan^2x) + 2sinxsqrt(1+cot^2x) where x in...

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  3. If (a+b)^2/(4ab)=sin^2theta, then

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  4. If sec theta =x+1/(4x), then tantheta + sec theta is equal to

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  5. If tanalpha+cotalpha=2, then

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  6. Which of the following identities are correct?

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  7. The value of the expression sinx+ siny + sinz where x, y, z are real ...

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  8. Let thetain(0,pi//4)and t(1)=(tantheta)^(tantheta), t(2)=(tantheta)^(...

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  9. If tan( pi/4 + x). tan(pi/4 - x) = 1 , then x equals

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  10. Find the value of tan22.5^(@)

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  11. If cos2alpha=(3cos2beta-1)/(3-cos2beta), then tan alpha is equal to

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  12. If sin alpha=-3/6, alpha in [0,2pi] then the possible values of cos (a...

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  13. f(alpha.beta) = cos^2+ beta cos^2(alpha+beta)- 2 cosalpha cosbeta cos(...

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  14. The value of cosA cos2A cos2^2A......cos(2^(n-1)A), where A in R may...

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  15. If A+B=pi/3, and cosA+cosB=1, then

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  16. cos^3x.sin2x=sum(m=1)^n(am)sin mx is an identity in x.

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  17. If 0 lt alpha, beta lt pi and they satisfy cos alpha + cosbeta - cos(a...

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  18. The angles A, B, C of a triangle ABC satisfy 4cosAcosB + sin2A + sin2B...

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  19. Which of the following statement(s) is/are correct?

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  20. If sintheta=K, -1<=K<=1 then number of values of theta for same value ...

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