# tan-1(1/2)+tan-1(1/3) is equal to

1.  π/2

2.  π/4

3.  π/3

4.  π/6

4

&#960;/4

Explanation :
No Explanation available for this question

# To remove the second term of the equation x4-8x3+x2-x+3=0, diminish the roots of the equation by

1.  1

2.  2

3.  5

4.  4

4

2

Explanation :
No Explanation available for this question

# The maximum possible number of real roots of the equation x5-6x2-4x+5 is

1.  3

2.  4

3.  5

4.  0

4

3

Explanation :
No Explanation available for this question

# The maximum value of 1+8sin2x2cos2x2 is

1.  -8

2.  -1

3.  3

4.  9

4

-8

Explanation :
No Explanation available for this question

# If α, β, γ are the roots of the equation x3+ax2+bx+c=0, then α-1+ β-1+γ

1.  a/c

2.  -b/c

3.  c/a

4.  b/a

4

-b/c

Explanation :
No Explanation available for this question

# The period of sin3x+cos3x is:

1.  π/3

2.  π

3.  2π

4.  2π/3

4

2&#960;/3

Explanation :
No Explanation available for this question

# If α,β,γ are the roots of 2x3-2x-1=0, then (Σ α β)2 is equal to

1.  -1

2.  1

3.  2

4.  3

4

1

Explanation :
No Explanation available for this question

# If |x|<1x,then [(1/2)log[(1+x)/(1-x)]] is equal to

1.  tanh-1x

2.  sinh-1x

3.  cosh-1x

4.  tanh x

4

tanh<sup>-1</sup>x

Explanation :
No Explanation available for this question

# If x2+y2+z2≠0, x=cy+bz, y=az+cx and z=bx+ay, then a2+b2+c2-2abc is equal to

1.  2

2.  a+b+c

3.  1

4.  ab+bc+ca

4

1

Explanation :
No Explanation available for this question

1.  h cotα

2.  h tanα

3.  h cosα

4.  h sinα

4