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Study bachelor degree and masters in mathematics degree courses, online trigonometric identities quiz, study guide has multiple choice question (MCQs): cos3α = with options 4cos³α - 3cosα, 4sinα - 3sin³α, 3cos³α - 4cosα and 3sinα - 4sin³α for scholars competing for college and universities' scholarships with college board ACT prep. Practice skills assessment test to learn online triple angle identities quiz questions with college math MCQs for math certification competitive exam prep.

MCQ: Cos3α =

1. 4sinα - 3sin³α
2. 4cos³α - 3cosα
3. 3cos³α - 4cosα
4. 3sinα - 4sin³α

A

MCQ: Tan(α + β) =

1. tanα-tanβ/1 + tanαtanβ
2. tanα+tanβ/1 - tanαtanβ
3. cotα+cotβ/1-cotαcotβ
4. cotα-cotβ/1 + cotαcotβ

B

MCQ: Cos(-435°) =

1. cos15°
2. −cos15°
3. −sin15°
4. sin15°

D

MCQ: Cosθ + cosπ =

1. −2sin(θ + π/2)sin(θ-π/2)
2. 2cos(θ + π/2)sin(θ-π/2)
3. 2cos(θ + π/2)cos(θ-π/2)
4. None of Above

C

MCQ: If tanθ < 0, sinθ < 0, then terminal arm of angle lies in quadrant

1. 1
2. 2
3. 3
4. 4

A