# Double Angle Identities Quizzes Online MCQs PDF Download eBook - 155

Double Angle Identities quiz questions, double angle identities multiple choice questions and answers PDF 155 to learn math course for online certification. Practice "Double Angle Identities" quiz with answers, double angle identities Multiple Choice Questions (MCQs) for online college degrees. Free double angle identities MCQs, de moivres theorem, online math learning, nature of roots of quadratic equation, operation on three sets, double angle identities test prep for SAT practice test.

"Cos(α + β)cos(α - β) =", double angle identities Multiple Choice Questions (MCQs) with choices *sin²α-cos²β, cos²α-sin²β, 2cosα, and 2sinα* for ACT test. Practice double angle identities questions and answers to improve problem solving skills for SAT test.

## Double Angle Identities Questions and Answers PDF Download eBook

MCQ: Cos(α + β)cos(α - β) =

- cos²α-sin²β
- sin²α-cos²β
- 2cosα
- 2sinα

A

MCQ: A ∪ ( B ∩ C ) =

- ( A ∪ C) ∪ ( A ∪ C)
- (B ∩ B) ∩ ( A ∩ C)
- (A ∪ B) ∩ C
- ( A ∪ B ) ∩ (A ∪ C)

D

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

- equal
- imaginary
- irrational
- real and unequal

D

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

- half of radius of the circle
- diameter of circle
- radius of the circle
- one-third of radius of the circle

C

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

- csc nθ + ι sin nθ
- tannθ +ι cotnθ
- cosnθ + ι sinnθ
- cosnθ - ι sinnθ

C