1.  1

2.  0

3.  -1

4.  √3

4

0

Explanation :
No Explanation available for this question

# If cosA/cosB=n,sinA/sinB=m, then (m2 – n2) sin2B is equal to:

1.  1 – n2

2.  1 + n2

3.  1 – n

4.  1 + n

4

1 – n2

Explanation :
No Explanation available for this question

# If (sin α + cosec α)2 + (cos α + sec α)2= k+tan2 α + cot2 α , then k is equal to

1.  3

2.  5

3.  7

4.  9

4

7

Explanation :
No Explanation available for this question

# is equal to:

1.  √3/4

2.  √3/2

3.  2/√3

4.  4/√3

4

2/√3

Explanation :
No Explanation available for this question

# cos 60 sin 240cos 720 is equal to

1.  -1/8

2.  -1/4

3.  1/8

4.  1/4

4

1/8

Explanation :
No Explanation available for this question

# If sin α + sin β =a, cos α + cos β= b, then sin (α + β)cos2((α-β)/2) is equal to:

1.  ab/2

2.  (a+b) /2

3.  2ab / (a2–b2)

4.  2ab / (a2+b2)

4

ab/2

Explanation :
No Explanation available for this question

# If tan θ1 =K cot θ2, then cos (θ1- θ2) / cos (θ1+ θ2) is

1.  1+ k / 1-k

2.  1-k / 1+k

3.  k+1 / k-1

4.  k-1 / k +1

4

1+ k / 1-k

Explanation :
No Explanation available for this question

# If tan θ + sec θ =√3 , then the prinicipal value of θ + π/6 is equal to

1.  π/4

2.  π/3

3.  2π/3

4.  3π/6

4

π/3

Explanation :
No Explanation available for this question

# If tan-13 + tan-1n= tan-18, then n is equal to

1.  5

2.  1/5

3.  5/14

4.  14/5

4

1/5

Explanation :
No Explanation available for this question

1.  1/e

2.  e

3.  e1/2

4.  e2

4