# The value of the expression (a - b)2/(b - c)(c - a) + (b - c)2/(a - b)(c - a) + (c -a)2/(a - b)(b - c) is

1.  0

2.  3

3.  1/3

4.  2

4

3

Explanation :
No Explanation available for this question

# If sin θ + cos θ = 1, then sin θ. Cos θ is equal to :

1.  0

2.  1

3.  2

4.  1/2

4

0

Explanation :
No Explanation available for this question

# Which is not correct

1.  Sin4 θ – cos4 θ = sin2 θ + cos2 θ

2.  Cos6 θ + sin6 θ = 1 – 3 sin2 θ cos2 θ

3.  1/sec θ - tan θ = sec θ + tan θ

4.  Cosec2 θ – 1 = cot2 θ

4

Sin4 θ – cos4 θ = sin2 θ + cos2 θ

Explanation :
No Explanation available for this question

# At a point P on the ground, the angle of elevation of the top of a 10m tall building and of a helicopter hovering some distance over the top of the building are 300 and 600 respectively. Then the height of the helicopter above the ground is

1.  10/√3 m

2.  10√3 m

3.  20/√3 m

4.  30 m

4

30 m

Explanation :
No Explanation available for this question

# If x2 + 1/x2 = 7 then x3 + 1/x3 =

1.  182

2.  18

3.  222

4.  22

4

18

Explanation :
No Explanation available for this question

# If x + 1/x = -2 then the value of x2n+1 + 1/x2n+1 where n is a positive integer, is

1.  0

2.  2

3.  -2

4.  -5

4

-2

Explanation :
No Explanation available for this question

# If 13 + 23 + ……. + 93 = 2025, then the value of (0.11)3 + (0.22)3 + ……. + (0.99)3 is close to

1.  0.2695

2.  2.695

3.  3.695

4.  0.3695

4

2.695

Explanation :
No Explanation available for this question

# A straight line parallel to BC of ABC intersects AB and AC at points P and Q respectively. AP = QC, PB = 4 units and AQ = 9 units, then the length of AP is

1.  25 units

2.  3 units

3.  6 units

4.  6.5 units

4

6 units

Explanation :
No Explanation available for this question

# Here in the adjoining figure :

1.  3600

2.  7200

3.  1800

4.  3000

4

3600

Explanation :
No Explanation available for this question

1.  3 cm

2.  4 cm

3.  5 cm

4.  6 cm

4