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Cos ((2pi)/7) + cos ((4pi)/7) + cos ((6p...

`Cos ((2pi)/7) + cos ((4pi)/7) + cos ((6pi)/7)` =

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Prove that cos((2pi)/7) cos((4pi)/7) cos((8pi)/7) =1/8

The numerical value of cos(( pi)/15)* cos ((2pi)/15)* cos ((4pi)/15) cos ((7pi)/15) = ...........

Prove that cos((2pi)/7)cos((4pi)/7)cos((8pi)/7)=1/8

1+cos((2 pi)/(7))+cos((4 pi)/(7))+cos((6 pi)/(7)) is equal to (i)-(1)/(2)(ii)0( iii) (1)/(2)(iv)(3)/(2)

cos ((pi) / (7)) cos ((2 pi) / (7)) cos ((4 pi) / (7)) =

If the value of cos((2 pi)/(7))+cos((4 pi)/(7))+cos((6 pi)/(7))+cos((7(pi)/(7)))=-(l)/(2) Find the value of l

cos ((pi) / (7)) * cos ((2 pi) / (7)) * cos ((3 pi) / (7)) =

If A=sin((2 pi)/(7))+sin((4 pi)/(7))+sin((8 pi)/(7)) and B=cos((2 pi)/(7))+cos((4 pi)/(7))+cos((8 pi)/(7)) then sqrt(A^(2)+B^(2)) is equal to

JEE MAINS PREVIOUS YEAR-JEE MAIN 2022-Question
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  2. If x^2/a^2+y^2/b^2=1 satisfies (4sqrt(2/5),3) and e=1/4 then, a^2+b^2 ...

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  3. Cos ((2pi)/7) + cos ((4pi)/7) + cos ((6pi)/7) =

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  4. If lim(x to 7) (18-[1-x])/([x]-3a) exist, then a is equal to

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  5. abs((14,28,-14),(-14,14,28),(28,-14,14))=abs(adj(adj(A))), then abs(A)...

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  6. The number of points where tangents are vertical or horizontal to curv...

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  9. If the coefficient of x^10 in (sqrtx/5^(1/4)+sqrt5/(x^(1/3)))^100 is 5...

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  10. Let S={z in C:z^2+barz=0}, then sum(zinS) (Re(z)+Im(z)) is equal to

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  11. The mean and variance of 10 observation are 15 & 15 respectively . If ...

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  12. Let f(x)={(int0^x (5-abs(t-3))dt,x gt 4) ,(x^2+bx,xle4):} and f(x) is ...

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  15. int0^2(abs(2x^2-3x)+[x-1/2])dx , where [.]=GIF , is equal to

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