# Ifand Z=cosθ+isinθ then (Z2n-1)/(Z2n+1)=

1.  itan nθ

2.  icot nθ

3.  -itan nθ

4.  -icot nθ

4

itan nθ

Explanation :
No Explanation available for this question

# The value of

1.  2

2.  0

3.  1

4.  -1

4

-1

Explanation :
No Explanation available for this question

# =

1.  α+β+γ=0

2.  α+β+γ=1

3.  α+β=γ

4.  α2+ β2+ γ2 =1

4

α+β+γ=1

Explanation :
No Explanation available for this question

# ABCD is parallegram with AC,BD as diagonals.Then=

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# The center and radius of the sphere

1.  (4,-2,2).2√6

2.  (-4,2,-2)√6

3.  (4,2,2),3√6

4.  (4,2,-2),(1/2)√6

4

(4,-2,2).2√6

Explanation :
No Explanation available for this question

# The area of the triangle formed by the points whose position vectors are

1.  √23 sq units

2.  √21 sq units

3.  √29 sq units

4.  √33 sq units

4

√29 sq units

Explanation :
No Explanation available for this question

1.

2.

3.

4.  (

4

Explanation :
No Explanation available for this question

# The angle of rotation of axes in order to eliminate xy term in the equation x2+2√3xy-y2=2a2 is

1.  π/6

2.  π/4

3.  π/3

4.  π/2

4

π/6

Explanation :
No Explanation available for this question

# If the extremities of a diagonal of a square are (1,-2,3),(2,-3,5) then the length of its side is

1.  √6

2.  √3

3.  √5

4.  √7

4

√3

Explanation :
No Explanation available for this question

1.  1

2.  6

3.  0

4.  -1

4