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Which of the following is not the qyadra...

Which of the following is not the qyadratic equation whose roots are `cosec^2thetaand sec^2theta`?

A

`x^(2)-2x+2=0`

B

`x^(2)+5x+5=0`

C

`x^(2)-4x+4=0`

D

none of these

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The correct Answer is:
C
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OBJECTIVE RD SHARMA ENGLISH-TRIGONOMETRIC RATIOS AND IDENTITIES-Exercise
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  3. cos9^@-sin9^@=

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  4. If y=(sin 3theta)/(sintheta), theta nen pi, then

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  5. about to only mathematics

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  8. If sin(x-y)=cos(x+y)=1/2, the value of x and y lyingbetween 0^(@)and 9...

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  10. If tan "" (alpha )/(2) and tan "" (beta)/( 2) are the roots of the eq...

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  11. 2x^(2) + 3x - alpha = 0 " has roots "-2 and beta " while the equation ...

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  12. If A+B+C=0, then the value of sum cot (B+C-A) cot (C+A-B) is equal to

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  14. For -pi/2 lt theta lt pi/2, (sintheta + sin 2theta)/(1+costheta + cos2...

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  15. If y tan (A+B+C) =x tan (A+B-C) = gamma then tan 2C=

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  18. Prove that sin47^(@)+sin61^(@)-sin11^(@)-sin25^(@)=cos7^(@).

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  19. Write the value of cos1^0+cos2^0+cos3^0++cos 180^0dot

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  20. The value of (tan7 0^0-tan2 0^0)/(tan5 0^0)=

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