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Practice trigonometric identities multiple choice questions (MCQs), math test 1 online to learn. Practice triple angle identities MCQs questions and answers on triple angle identities, trigonometric identities, online math learning, basic trigonometry formulas, trigonometric ratios of allied angles with answers. Free trigonometric identities study guide has answer key with choices as 4cos3α - 3cosα, 4sinα - 3sin3α, 3cos3α - 4cosα and 3sinα - 4sin3α of multiple choice questions (MCQ) as cos3α = to test learning skills. Study to learn triple angle identities quiz questions to practice MCQ based online exam preparation test.

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