Date: December 2016
(1) Question no. 1 is compulsory.
(2) Attempt any 3 questions from remaining five questions.
If `cos alpha cos beta=x/2, sinalpha sinbeta=y/2`, prove that:
`sec(alpha -ibeta)+sec(alpha-ibeta)=(4x)/(x^2-y^2)`
Chapter: [5] Complex Numbers
If `z =log(e^x+e^y) "show that rt" - s^2 = 0 "where r"= (del^2z)/(delx^2),t=(del^2z)/(dely^2)"s"=(del^2z)/(delx dely)`
Chapter: [5] Complex Numbers
If x = uv, y `=(u+v)/(u-v).`find `(del(u,v))/(del(x,y))`.
Chapter: [5] Complex Numbers
If `y=2^xsin^2x cosx` find `y_n`
Chapter: [5] Complex Numbers
Express the matrix as the sum of symmetric and skew symmetric matrices.
Chapter: [7] Matrices
Evaluat `lim_(x->0) (e^(2x)-(1+x)^2)/(xlog(1+x)`
Chapter: [10] Indeterminate Forms, Numerical Solutions of Transcendental Equations and System of Linear Equations
Show that the roots of x5 =1 can be written as 1, `alpha^1,alpha^2,alpha^3,alpha^4` .hence show that `(1-alpha^1) (1-alpha^2) (1-alpha^3)(1-alpha^4)=5.`
Chapter: [5] Complex Numbers
Reduce the following matrix to its normal form and hence find its rank.
Chapter: [7] Matrices
Solve the following equation by Gauss-Seidel method upto four iterations
4x-2y-z=40, x-6y+2y=-28, x-2y+12z=-86.
Chapter: [10] Indeterminate Forms, Numerical Solutions of Transcendental Equations and System of Linear Equations
Investigate for what values of μ and λ the equations x+y+z=6, x+2y+3z=10, x+2y+λz=μ has
1) No solution
2) A unique solution
3) Infinite number of solutions.
Chapter: [7] Matrices
If `u=x^2+y^2+z^2` where `x=e^t, y=e^tsint,z=e^tcost`
Prove that `(du)/(dt)=4e^(2t)`
Chapter: [5] Complex Numbers
Show that `sin(e^x-1)=x^1+x^2/2-(5x^4)/24+`...................
Chapter: [9] Applications of Partial Differentiation , Expansion of Functions
Expand `2x^3+7x^2+x-6` in powers of (x-2)
Chapter: [5] Complex Numbers
If x = u+v+w, y = uv+vw+uw, z = uvw and φ is a function of x, y and z
Prove that 
Chapter: [8] Partial Differentiation
If tan(θ+iφ)=tanα+isecα
Prove that
1)`e^(2varphi)=cot(varphi/2)`
2) `2theta=npi+pi/2+alpha`
Chapter: [8] Partial Differentiation
Find the roots of the equation `x^4+x^3 -7x^2-x+5 = 0` which lies between 2 and 2.1 correct to 3 places of decimals using Regula Falsi method.
Chapter: [10] Indeterminate Forms, Numerical Solutions of Transcendental Equations and System of Linear Equations
If y=(x+√x2-1 ,Prove that
`(x^2-1)y_(n+2)+(2n+1)xy_(n+1)+(n^2-m^2)y_n=0`
Chapter: [6.01] Successive Differentiation
Using the encoding matrix `[(1,1),(0,1)]` encode and decode the messag I*LOVE*MUMBAI.
Chapter: [7] Matrices
Considering only principal values separate into real and imaginary parts
`i^((log)(i+1))`
Chapter: [6.02] Logarithm of Complex Numbers
Show that `ilog((x-i)/(x+i))=pi-2tan6-1x`
Chapter: [6.02] Logarithm of Complex Numbers
Using De Moivre’s theorem prove that]
`cos^6theta-sin^6theta=1/16(cos6theta+15cos2theta)`
Chapter: [5] Complex Numbers
If u `=sin^(-1)((x^(1/3)+y^(1/3))/(x^(1/2)-y^(1/2)))`, Prove that
`x^2(del^2u)/(delx^2)+2xy(del^2u)/(delxdely)+y^2(del^2u)/(dely^2)=tanu/144(tan^2u+13)`
Chapter: [7] Matrices
Find the maxima and minima of `x^3 y^2(1-x-y)`
Chapter: [9] Applications of Partial Differentiation , Expansion of Functions
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