# Double Angle Identities Quiz Questions and Answers 155 PDF Download

Learn double angle identities quiz, online college math test 155 for online courses, distance learning. Free math MCQs questions and answers to learn double angle identities MCQs with answers. Practice MCQs to test knowledge on double angle identities, operation on three sets, nature of roots of quadratic equation, online math learning, de moivres theorem for online education preparation guide.

Free double angle identities course worksheet has multiple choice quiz question as cos(α + β)cos(α - β) = with options cos²α-sin²β, sin²α-cos²β, 2cosα and 2sinα with problems solving answer key to test study skills for online e-learning, viva help and jobs' interview preparation tips, study double angle identities multiple choice questions based quiz question and answers.

## Quiz on Double Angle Identities Quiz PDF Download Worksheet 155

Double Angle Identities Quiz

MCQ. Cos(α + β)cos(α - β) =

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

A

Operation on Three Sets Quiz

MCQ. A ∪ ( B ∩ C ) =

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

D

Nature of roots of quadratic equation Quiz

MCQ. Roots of quadratic equation 2x² - 5x + 3 = 0 are

- equal
- imaginary
- irrational
- real and unequal

D

Online Math Learning Quiz

MCQ. A radian is measure of 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

De Moivres Theorem Quiz

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