Double Angle Identities Quiz PDF: Questions and Answers - 155

MCQ 771: Cos(α + β)cos(α - β) =

1. cos²α-sin²β
2. sin²α-cos²β
3. 2cosα
4. 2sinα

MCQ 772: A ∪ ( B ∩ C ) =

1. ( A ∪ C) ∪ ( A ∪ C)
2. (B ∩ B) ∩ ( A ∩ C)
3. (A ∪ B) ∩ C
4. ( A ∪ B ) ∩ (A ∪ C)

MCQ 773: The roots of the quadratic equation 2x² - 5x + 3 = 0 are

1. equal
2. imaginary
3. irrational
4. real and unequal

MCQ 774: A radian is the measure of the central angle of an arc of a circle whose length is equal to the

1. half of radius of the circle
2. diameter of circle
3. radius of the circle
4. one-third of radius of the circle

MCQ 775: For all n belong to Z, ( cosθ + ι sinθ )n

1. csc nθ + ι sin nθ
2. tannθ +ι cotnθ
3. cosnθ + ι sinnθ
4. cosnθ - ι sinnθ