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sin^2(A/2)+sin^2(B/2)-sin^2(C/2)=1-2cos(...

`sin^2(A/2)+sin^2(B/2)-sin^2(C/2)=1-2cos(A/2)cos(B/2)sin(C/2)`

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  2. Let overlinea=2overlinei+4overlinej-5overlinek,overlineb=overlinei+ove...

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  5. Find period of tan(x+4x+9x+…….n^(2)x).

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  7. Show that |{:(bc,b+c,1),(ca,c+a,1),(ab,a+b,1):}|=(a-b)(b-c)(c-a)

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  8. If ABCDEF is a regular hexagon with centre O , then P.T bar(AB)+bar(A...

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  9. IF overlinea=overlinei-2overlinej-3overlinek,overlineb=2overlinei+over...

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  10. If A is not an integral multiple of (pi)/(2), prove that (i) tan A +...

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  15. For all ninNN, prove by principle of mathematical induction that, (1...

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  16. IF A=[{:(1,-2,3),(0,-1,4),(-2,2,1):}] than find (A')^-1.

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  17. Solve the following system of equations by using Cramer,s ruel . 3x...

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  18. If A=(1,-2,-1) , B=(4,0,-3),C= (1,2,-1),D=(2,-4,-5) then find distan...

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  19. sin^2(A/2)+sin^2(B/2)-sin^2(C/2)=1-2cos(A/2)cos(B/2)sin(C/2)

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  20. In a DeltaABC, If a=13 , b=14 , c=15, find R,r,r1,r2andr3.

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