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Prove by vector method that in a Delta A...

Prove by vector method that in a `Delta ABC, c^(2) = a^(2) + b^(2) - 2ab cos C`.

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SHARAM PUBLICATION-MODEL QUESTION PAPER-4-EXERCISE
  1. Find the equation of the tangent to the curve x = y^2-1 at the point w...

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  2. Find the intervals in which the function y=(lnx)/(x) is increasing and...

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  3. Prove by vector method that in a Delta ABC, c^(2) = a^(2) + b^(2) - 2a...

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  4. The diagonals of a parallelogram are given by veca =2hati - 3hatj + 5h...

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  5. Find the image of the point (2, 3, 4) with respect to the plane x - y ...

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  6. Find the equation of planes passing throught the points (1,2,3),(1,-4,...

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  7. If A and B are square matrices of same order, then show by means of an...

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  8. Prove that the following. [[1+a,1,1],[1,1+b,1],[1,1,1+c]] = abc(1+1/...

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  9. Find the value of |{:(17,58,97),(19,60,99),(18,59,98):}| without expan...

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  10. Find the inverse of [(2,-1),(1,3)].

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  11. Evaluate int tan^-1 sqrt((1-x)/(1+x))dx

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  12. Evaluate int (e^x-1)/(e^x+1) dx

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  13. Evaluate int(0)^(pi//4)log(1+tanx)dx.

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  14. Find the area of the region bounded by the curve y=6x-x^(2), the X-axi...

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  15. Solve the following differential equations x log x (dy)/(dx)+y= 2 lo...

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  16. Find the value of k so that the function f defined by f(x)={((kcos x)/...

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  17. Find (dy)/(dx) if x^y = y^x.

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  18. Show that the rectangle of maximum area that can be inscribed in a giv...

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  19. Evaluate int0^ pi x/(1+ sin x) dx

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  20. Find the area of region in the first quadrant enclosed by the X-axis, ...

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