# A: If x+y+z= xyz then ∑(3x-x3)/(1-3x2)= ∏(3x-x3)/(1-3x2) R: If tan A+tan B+tan C= tan A tan B

1.  A is true and R is correct explanation of A

2.  A is true and R is not correct explanation of A

3.  Ais true, R is false

4.   A is false, R is true

4

A is true and R is correct explanation of A

Explanation :
No Explanation available for this question

# A: If x= sin(α-β) sin(γ-δ), y= sin(β –α)sin (δ –γ), z=sin(γ-α)sin(β-δ) then x+y+z=0

1.  A is true and R is correct explanation of A

2.  A is true and R is not correct explanation of A

3.  Ais true, R is false

4.  A is false, R is true

4

Ais true, R is false

Explanation :
No Explanation available for this question

# R:cos α+ cos(α+β)+ cos(α+2β)+...+ cos(α+(n-1)β)= (sin(nβ/2

1.  A is true and R is correct explanation of A

2.  A is true and R is not correct explanation of A

3.  Ais true, R is false

4.  A is false, R is true

4

A is true and R is correct explanation of A

Explanation :
No Explanation available for this question

# A: sin π/n+ sin 3π/n+ sin 5π/n+... to nterms=0 R: sin α+sin(α+β)+... to n terms= (sin(nβ/2)/sin β/2) sin(2&alp

1.  A is true and R is correct explanation of A

2.  A is true and R is not correct explanation of A

3.  Ais true, R is false

4.  A is false, R is true

4

A is true and R is correct explanation of A

Explanation :
No Explanation available for this question

# A: If A+B+C= 1800 then cos2 A+ cos2 B+ cos2 C= 1- 2 cos A cos B cos C R: If A+B+C= 1800 the

1.  A is true and R is correct explanation of A

2.  A is true and R is not correct explanation of A

3.  Ais true, R is false

4.   A is false, R is true

4

A is true and R is correct explanation of A

Explanation :
No Explanation available for this question

# A: If x+y+z= xyz then ∑(2x)/(1-x2)= ∏(2x)/(1-x2) R: If tan A+tan B+tan C= tan A tan B tan C then A+B+C= nπ, n εZ

1.  A is true and R is correct explanation of A

2.  A is true and R is not correct explanation of A

3.  Ais true, R is false

4.  A is false, R is true

4

A is true and R is correct explanation of A

Explanation :
No Explanation available for this question

# A: Period of sin 8x+cos 2x is π R: Period of sin ax or cos ax is 2π/|a|

1.  A is true and R is correct explanation of A

2.  A is true and R is not correct explanation of A

3.  Ais true, R is false

4.  A is false, R is true

4

A is true and R is correct explanation of A

Explanation :
No Explanation available for this question

# A:The maximum value of 2 cos2 θ+√5 cos θ sin θ+4 sin2 θ is 9/2 R: The maximum value of a cos

1.  A is true and R is correct explanation of A

2.  A is true and R is not correct explanation of A

3.  Ais true, R is false

4.  A is false, R is true

4

A is true and R is correct explanation of A

Explanation :
No Explanation available for this question

# The function sinh(tanh x) increases in

1.  0

2.  R

3.   1

4.  ∞

4

R

Explanation :
No Explanation available for this question

# The function tan-1(sin x) increases in

1.  (2nπ-π/2, 2nπ+π/2) (n € z)

2.  (2nπ+π/2, 2nπ+3π/2) (n € z)

3.  (2nπ+π/4, 2nπ+π/2) (n € z)

4.  (2nπ-π/2, 2nπ+3π/2) (n € z)

4