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A quadratic equation whose roots are tan...

A quadratic equation whose roots are `tan22 1^(@)/2 and cot22 1^(@)/2` is

A

`x^(2)-2sqrt2x+1=0`

B

`2x^(2)-sqrt2x+1=0`

C

`x^(2)+2sqrt2x-1=0`

D

`x^(2)-2sqrt2x-1=0`

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The correct Answer is:
A
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AAKASH SERIES-MULTIPLE & SUBMULTIPLE ANGLES-PRACTICE EXERCISE
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  15. "sin"^(4)pi/8" +sin"^(4)(3pi)/8" +sin"^(4)(5pi)/8" +sin"^(4)(7pi)/8=

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