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Prove that sinalpha*sin(60-alpha)sin(6...

Prove that `sinalpha*sin(60-alpha)sin(60+alpha) = 1/4*sin3alpha`

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AAKASH INSTITUTE ENGLISH-TRIGNOMETRIC FUNCTIONS -Section-C (Objective Type Questions More than one options are correct )
  1. If sintheta= a for e xactly one value of theta in [0,(7pi)/3], then ...

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  2. If sin theta + sqrt(3) cos theta = 6x - x^(2) - 11, 0 le theta le 4 p...

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  3. Solve the equation sinx + sqrt(3)cosx=sqrt(2)

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  4. (1-tanx)/(1+tanx)=tanyandx-y=pi/6,t h e nx , y

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  5. The possible value of theta in [-pi, pi] satisfying the equation 2(co...

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  6. The number of all possible triplets (p, q, r) such that p + qcos2theta...

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  7. Prove that sinalpha*sin(60-alpha)sin(60+alpha) = 1/4*sin3alpha

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  8. Find the coordinates of the points of intersection of the curves y=cos...

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  9. A value of theta satifying 4costheta sintheta - 2sintheta =0 is

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  10. The equation sinx+sin2x+2sinxsin2x=2cosx+cos2x is satisfied by values ...

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  11. The solution set of sin 3theta + cos 2theta = 0 iss

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  12. The general solution of the equation 2^(cos2x)+1=3*2^(-sin^2x) is

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  13. (m+2)sin theta+(2m-1)cos theta=2m+1, if

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  14. In a triangle ABC,a/b=2+sqrt(3) and /C=60^(@) then angle A and B is

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  15. In a triangle ABC

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  16. If cosA + cosB =4sin^(2)(C/2), then

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  17. In a triangle ABC, points D and E are taken on side BC such that BD= D...

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  18. In a triangle, with usual notations, the length of the bisector of ang...

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  19. An ordered triplet solution (x,y,z) with x,y,z int (0,1) and satisfyin...

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  20. In a triangle ABC, acosB + b cosC + c cosA =(a+b+c)/2 then

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