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If x,y,z are respectively sines and p,q,r are respectively the cosines of angles α,β,γ which are in A.P with common difference 2pi/3 ,then 1)x+y+z=? 2)p+q+r=? 3)xy+zx+yz=? ...
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prove tan a + tan 2a + tan 3a = tan a . tan 2a . tan 3a my friend gave me from school.. i cant get anything to work on.. this is so tough :( ...
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There are N points in a Plane. All the points are joined with each other. Note that the line segments are made. The lines are not extended on either sides. They meet at a lot of points. What is the number of points where thes ...
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Σk=0 to r rCk×(2n-r)C(n-k) = 2nCn ...
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d2y/dx2=x ln(dy/dx) what is the degree of the eqn.?? ...
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x+2|y|=3y where y=f(x),then f(x) is.... A)continuous everywhere B)diff everywhere C)discontinuous at x=0 D)none ...
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f(x)=[x]+[-x] so for integral values of x, f(x)=0 then f'(x)=0.....so hw come it cannot be diff at integral pts.... ...
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x+2|y|=3y where y=f(x),then f(x) is.... A)continuous everywhere B)diff everywhere C)discontinuous at x=0 D)none ...
