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Value of (2sin9^(@)sin 21^(@)sin 39^(@)s...

Value of `(2sin9^(@)sin 21^(@)sin 39^(@)sin 51^(@)cos21^(@)sin 81^(@))/(sin54^(@))` is equal to:-

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RESONANCE DPP ENGLISH-JEE MAINS-All Questions
  1. The number of roots of the equation, x-2/(x-1)=1-2/(x-1) is (a) 0 (b) ...

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  2. Concentric circles of radii 1,2,3,. . . . ,100 c m are drawn. The inte...

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  3. Value of (2sin9^(@)sin 21^(@)sin 39^(@)sin 51^(@)cos21^(@)sin 81^(@))/...

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  4. Let f(n)=sum(r=0)^nsum(k=r)^n(k r)dot Find the total number of divis...

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  5. Complete solution of inequality ||3x-9|+2|>2 is (a)(-oo,oo) (b) {3} ...

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  6. Draw the graphs of y=x+x/(|x|)

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  7. If the sum of n terms of an A.P is cn (n-1)where c ne 0 then the sum o...

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  8. Suba Rao started work in 1995 at an annual salary of Rs 5000 and re...

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  9. lim(n->oo) sum(r=1)^ntan^(- 1)((2r+1)/(r^4+2r^3+r^2+1)) is equal to

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  10. Consider an A.P. a(1), a(2), "……"a(n), "……." and the G.P. b(1),b(2)"…....

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  11. If f(x)=sin{[x+5]+{x-{x-{x}}}" for "x in (0,pi/4) is invertible, where...

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  12. Solution of differential equation (dy)/(dx)=(y^2-2x y-x^2)/(y^2+2x y-x...

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  13. If (cosA)/(cosB)=p,(sinA)/(sinB)=q,then show that (p^(2)(1-q^(2)))/(p^...

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  14. prove that sum(k=0)^10 20^Ck=2^(19)

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  15. The inequality [2-x]+2[x-1]geq0 is satisfied by (where[.] denotes grea...

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  16. If Sn, denotes the sum of n terms of an AP, then the value of (S(2n)-...

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  17. If a x^2+b x+6=0 does not have distinct real roots, then find the leas...

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  18. If the function f: R-{(2005)/(153)}vecR-{(2005)/(153)} , defined by f(...

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  19. Range of the function f (x) =cot ^(-1){-x}+ sin ^(-1){x} + cos ^(-1) {...

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  20. (i) The value of x + y + z is 15. If a, x, y, z, b are in AP while the...

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