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If x and y are real number such that x^2...

If x and y are real number such that `x^2 +2xy-y^2=6`, find the minimum value of `(x^2+y^2)^2`

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ALLEN-BASIC MATHS,LOGARITHIM, TRIGNOMETRIC RATIO AND IDENTITIES AND TRIGNOMETRIC EQUATION -EXERCISE (S-1)
  1. (2cos4 0^(@)-cos2 0^(@))/(sin2 0^(@)

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  2. cos^6(pi/16)+cos^6(3pi/16)+cos^6(5pi/16)+cos^6(7pi/16)

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  3. tan1 0^(@)-tan5 0^(@)+tan7 0^(@)

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  4. Given that (1+tan1^@)(1+tan2^@)+...........+(1+tan45^@)= 2^n find n .

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  5. If a leq 3 cos (theta+pi/3)+5cos theta+3 leq b, find a and b, where ...

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  6. Let k=1^@ then prove that sum(n=0)^(88)1/(cosnkcos(n+1)k)=cosk/sin^2k

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  7. If x and y are real number such that x^2 +2xy-y^2=6, find the minimum...

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  8. If A+B+C=pi, prove that tan^2A/2+tan^2B/2+tan^2C/2geq1.

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  9. solve the equation for x , 5^(1/2)+5^(1/2 + log5 sinx) = 15^(1/2 + log...

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  10. Find values of theta satisfying sintheta+sin5theta=sin3theta such that...

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  11. Solve the equality 2sin11 x+cos3x+sqrt(3)sin3x=0.

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  12. Find all value of theta, between 0 & pi, which satisfy the equation;...

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  13. Find the general solution of the equation, 2+tanx.cotx/2.tanx/2=0

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  14. Determine the smallest positive value of x which satisfy the equation ...

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  15. Find the general solution of the trignometric equation 3^(1/2+log(3)(c...

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  16. Find the value of theta, which satisfy 3-2 cos theta-4 sintheta-cos 2...

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  17. The range of 'y, such that the equation in x, y + cos x = sin x has a ...

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  18. Find the general solution values of theta for which the quadratic (sin...

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  19. Prove that the equations sin x*sin 2x*sin 3x = 1 have no solution.

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  20. If alpha and beta are the roots of the equation, acostheta+bsintheta=c...

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