# If sin-1x-cos-1x = π/6, then x is equal to

1.  1/2

2.  √3/2

3.  -1/2

4.  -√3/2

4

&#8730;3/2

Explanation :
No Explanation available for this question

# sin h ix is equal to

1.  i sin x

2.  sin (ix)

3.  - sin x

4.  i sin (ix)

4

i sin x

Explanation :
No Explanation available for this question

# The perimeter of a triangle is 16 cm, one of the sides is of length 6 cm. If the area of the triangle is 12 sq cm. Then the triangle is

1.  Right angled

2.  Isosceles

3.  Equilateral

4.  Scalene

4

Isosceles

Explanation :
No Explanation available for this question

# If the altitude of a triangle are in arithmetic progression, then the sides of the triangle are in

1.  Arithmetic

2.  Harmonic

3.  Geometric

4.  Arithmetico - geometric

4

Harmonic

Explanation :
No Explanation available for this question

# If ΔABC is right angled at A, then r2 + r3 is equal to

1.  r1-r

2.  r1+r

3.  r-r1

4.  R

4

r<sub>1</sub>-r

Explanation :
No Explanation available for this question

# If  α,β are the cube roots of unity, then α5+β5+αβ is equal to

1.  0

2.  α

3.  β

4.  1

4

0

Explanation :
No Explanation available for this question

# P represents z = x + iy in Argand plane and |3z-1| = 3|z-2|;then locus of P is

1.  x = 0

2.  x2 + y2=3

3.  y = x

4.  6x = 7

4

6x = 7

Explanation :
No Explanation available for this question

# The least positive integer n such that (1-i/1+i)2n =1,is

1.  2

2.  4

3.  6

4.  14

4

2

Explanation :
No Explanation available for this question

# If (3+2isinθ)/(1=2isinθ) is real, then θ is equal to

1.  0

2.  π/4

3.  π/3

4.  π/2

4

0

Explanation :
No Explanation available for this question

1.  y2 = 4x2

2.  4y2 = x2

3.  y =3x

4.  4x + y=0

4