# If x =√(1-cosθ/1+cosθ) then 2x/(1-x2) =

1.  sinθ

2.  cosθ

3.  tanθ

4.  cotθ

4

tan&#952;

Explanation :
No Explanation available for this question

# If sinA + sinB = l, cosA - cosB = m, then the value of cos(A - B) =

1.  (l2-m2)/(l2+m2)

2.  (l2+m2)/(l2-m2)

3.  2lm/(l2+m2)

4.  2lm/(l2-m2)

4

(l2-m2)/(l2+m2)

Explanation :
No Explanation available for this question

# tan (1/2 cos-1(0)) =

1.  0

2.  -1

3.  1

4.  1/2

4

1

Explanation :
No Explanation available for this question

# The domain and range of f(x) = cothx are respectively.....

1.  R-{0}, R-{-1,1}

2.  R-{-1,1}, R-{0}

3.  R, R-{0}

4.  R-{0},R

4

R-{0}, R-{-1,1}

Explanation :
No Explanation available for this question

# The value of θ satisfying sin5θ=sin3θ-sinθ and 0<θ<π/2 are:

1.  π/6, π/3

2.  π/6, π/4

3.  π/4, π/3

4.  π/4, π/2

4

&#960;/6, &#960;/3

Explanation :
No Explanation available for this question

# If cos-1(3/5) - sin-1(4/5) = cos-1(x), then x

1.  0

2.  -1

3.  1

4.  π /2

4

1

Explanation :
No Explanation available for this question

# If in a Δ ABC, s=2b, cot A/2 cot C/2 is equal to:

1.  1

2.  2

3.  3

4.  √2

4

1

Explanation :
No Explanation available for this question

# If the sides of a Δ ABC are 6, 8, 10 unity, then the radius of its, circumcircle is:

1.  4 unit

2.  3 unit

3.  6 unit

4.  5 unit

4

5 unit

Explanation :
No Explanation available for this question

# From the top of a building 60 m high the angle of elevation of a top of a tower is found to be equal to the angle of depression of a foot of a tower, then the height of tower is (in metre)........

1.  90

2.  105

3.  100

4.  120

4

100

Explanation :
No Explanation available for this question

# A point moves such that PA2 - PB2 = 4a2 where A and B are the points (a, 0) and (-a, 0) respectively, the locus of P is:

1.  a straight line

2.  a circle

3.  an ellipse

4.  a parabola

4