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A quadratic equation whose roots are sin...

A quadratic equation whose roots are `sin^(2) 18^(@) , cos^(2) 36^(@) ` are

A

`16x^(2)-12x+1=0`

B

`16x^(2)+12x+1=0`

C

`16x^(2)-12x-1=0`

D

`16x^(2)-10x-1=0`

Text Solution

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The correct Answer is:
A
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AAKASH SERIES-MULTIPLE & SUBMULTIPLE ANGLES-EXERCISE-II
  1. If A and B are acute angles satisfying 3sin^(2)A+2sin^(2)B=1 and 3 sin...

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  2. If cos (theta - alpha) , cos theta , cos (theta + alpha ) are in H.P....

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  3. A quadratic equation whose roots are sin^(2) 18^(@) , cos^(2) 36^(@) ...

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  4. Prove that (1)/(cos 290^(@))+(1)/(sqrt3 sin 250^(@) )=(4)/(sqrt3)

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  5. Prove that sqrt3 csc 20 ^(@)- sec 20^(@)=4

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  6. sin6^(@)sin42^(@)sin66^(@)sin78^(@)=

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  7. If A=tan6^(@) tan42^(@), B=cot66^(@) cot78^(@) then

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  8. cos6^(@)sin24^(@)cos72^(@)=

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  9. Prove that cos. (pi)/(11). cos . (2 pi)/(11). cos . (3 pi)/(11) cos. (...

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  10. "Cos"(2pi)/15."Cos"(4pi)/15."Cos"(8pi)/15."Cos"(14pi)/15=

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  11. If 630^@ lt A lt 720^(@) , |tan A|=12//5, " then " tan A//2=

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  12. Prove that (1+cos""pi/10)(1+cos""(3pi)/10)(1+cos""(7pi)/10)(1+cos""(9p...

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  13. "cos"^(2)pi/10+"cos"^(2)(2pi)/5+"cos"^(2)(3pi)/5+"cos"^(2)(9pi)/10=

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  14. Show that cos^4""pi/8+cos^4""(3pi)/8+cos^4""(5pi)/8+cos^4""(7pi)/8=3/2

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  15. tan9^(@)-tan27^(@)-tan63^(@)+tan81^(@)=

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  16. x/(costheta)=y/(cos(theta-(2pi)/3))=z/(cos(theta+(2pi)/3)) then x+y+z=

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  17. The minimum value of cos^(3) x+ cos^(3) (120^(@) + x) + cos^(3) (120^...

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  18. If x= tan15^(@) , y="cosec"75^@ and z= 4 sin18^(@) , then

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  19. cos^(2)(alpha+beta)+cos^(2)(alpha-beta)-cos2alpha cos2beta=

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  20. If cos^(3) theta + cos^(3)((2pi)/(3) + theta) + cos^(3)((4pi)/(3) + th...

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