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Posted Date: 07 Aug 2008      Posted By:: tamil    Member Level: Gold  Points: 5 (Rs. 1)

2006 Bangalore University B.Sc Mathematics MATHEMATICS Question paper

Course: B.Sc Mathematics   University/board: Bangalore University

I Sem B.SC Examination, Mar/Apr 2006
(Y2K7 scheme)(2007-08 and onwards)
Time:3 hrs
Max marks:80
Instruction:Answer all the Sections
Answer any ten questions(10*2=20)
1)Define symmetric and skew symmetric matrix and give an example for each
2) Find the chararcteristic roots of the matrix
1 4
3 2
3)State the necessary and sufficient condition for a non empty subset of group G
To be a subgroup of G
4)Find the cross product of vector a=2i+3j-2k and vector b=12i-4j+8k are
5)Find the cross product of vector a=2i+3j+4k and vector b=i-k
6)The centroid of a triangle is(4,-1,1).If two of the vctorices are(4,-2,7) and
(5,-4,1) find the third vertex.
7)Find the direction cosine of a line equally inclined with the co-ordinate axes
8)Find the centre and the radius of the sphere 4x2+4y2+4z2-16x-24y+16=0
9)Find the second derivative of log(sin x) w.r.t. x
10)Find the nth derivative of y=sin3x
11 if z=xy find delta z/delt x,delta z/delta y
Integration cos tita/root of 4-sin2 tita dtita
With lower limit 0 and higher limit pie/2
Integration of 1/2x2+x-3 dx
12)Solve dy/dx=ex+y
15)Solve dy/dx +(cot x)y=1


II Answer any two questions(2*5=10)
1)solve the following system of equation by matrix method:
2)Verify Cayley Hemilton theorem for the
Matrix a= [3 2 an hence find A-1
-1 4]
3)Find a matrix P such that P-1AP is a diagonal matrix where A=[3 4
-2 -3]
III Answe any two questions(2*5=10)
1)Write the multiplication modulo 6 table for the set G={1,2,3,4,5} is(G,X6) a
Group?Give reason
2)Show that the set of all fourth root of unity form a group under usual
3)Find the area of the parallelogram whose diagonals are 3i-2j-k and -4i+2j+k
4)Prove that[vectora*b;vectorb*c;vectorc*a]=[vectora,vectorb,vectorc]2
IV Answer any two questions(2*5=10)
1)Find the angle between the diagonals of a cube
2)Find the equation of the plane passing through the point (-2,4,0)(-3,2,-9)
And parallel to the line whose direction ratio are 3,-2,3
3)Derive the equation of a sphere wi9th a centre (x1,y1,z1) and radius R
4)Find the equation of the right circular cone whose vertex is(2,3,4) axis
Makes equal angles with the coordinatues axes and semivertical angle is 300

V Answer any 4 (4*5=20)
1)Find the nth drivative of cos4x
2) If y=sin-1x ,show that
3) If u=log(x4+y4/x-y), show that x *delta u/delta x +y*delta u/delta y=3
4)Evaluate the integration of(x-1)/(x-2)(x-3)dx
5) Evaluate the integration of 1/(3-cos x) dx
6)Evaluate the integration of x *sin3x*cos x dx
7) Evaluate the integration sec4tita d tita with upper limits pie/4 and lower limits 0

VI Answe any two (2*5=10
1)Solve y dy/dx=ex+y
2)Solve dy/dx=x2+y2/xy
3)Verify the exactness and solve the equation
4)Solve cos2x dy/dx +y=tan x

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