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Find the angle between the lines, whose ...

Find the angle between the lines, whose direction cosines are given by the equation `3l+m+5n=0` and `6mn-2nl+5lm=0`.

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The angle between the lines whose direction cosines satisfy the equations l+m+n=0 " and " l^(2)=m^(2)+n^(2) is

Find the angle between the lines whose direction cosines satisfy the equaitons l + m + n = 0, l^(2) + m^(2) - n^(2) = 0 .

SRISIRI PUBLICATION-QUESTION PAPER -SECTION - C
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  4. If a line makes angles alpha, beta, lambda,delta with the four diagon...

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  5. If y=Tan^""(-1)((sqrt((1+x^(2)))+sqrt(1-x^(2)))/(sqrt(1+x^(2))-sqrt(1-...

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  6. Find the derivative of (sinx)^(log x)+x^(sinx).

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  7. Find the derivative of x^(tanx)+(sinx)^(cosx) w.r.to x.

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  8. if siny=xsin(a+y) then show that dy/dx=sin^(2)(a+y)/(sina).

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  9. If x^(y)=y^(x) then show that dy/dx=(y(xlogy-y))/(x(ylogx-x)).

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  10. If x^(y) + y^(x) = a^(b) then prove that (dy)/(dx)=-[(yx^(y-1)+y^(x)L...

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  11. If sqrt(1-x^(2))+sqrt(1-y^(2))=a(x-y) then prove that dy/dx=(sqrt(1-y^...

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  12. If y=xsqrt(a^(2)+x^(2))+a^(2)log(x+sqrt(a^(2)+x^(2))), then show that ...

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  13. IF the tangent at a point on the curve x^(2//3)+y^(2//3)=a^(2//3) inte...

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  14. Find the angle between the curves xy=2 and x^(2)+4y=0

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  15. The sum of the intercepts on the coordinate axes of any tangent to sqr...

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  16. Show that the tangent at P(x(1),y(1)) on the curve sqrt(x)+sqrt(y)=sqr...

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  17. Find the maximum area of the rectangle that can be formed with fixed p...

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  18. From a rectangular sheet of dimensions 30cm times 80cm, four squares o...

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