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Learn trigonometric identities MCQ: cosθ + cosπ =, with choices −2sin(θ + π/2)sin(θ-π/2), 2cos(θ + π/2)sin(θ-π/2), 2cos(θ + π/2)cos(θ-π/2), and none of above for colleges that offer certificate programs. Practice merit scholarships assessment test, online learning basic trigonometry formulas quiz questions for competitive exams in math majors for SAT subject test tutoring.

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: Tan(α - β) =

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

A

MCQ: Cot(α - β) =

1. cotα-cotβ/1 + cotαcotβ
2. cotα+cotβ/1-cotαcotβ
3. cotαcotβ-1/cotα+cotβ
4. cotαcotβ+1/cotα+cotβ

B

MCQ: Cot(α + β) =

1. cotα-cotβ/1 + cotαcotβ
2. cotα+cotβ/1-cotαcotβ
3. cotαcotβ-1/cotα+cotβ
4. cotαcotβ+1/cotα+cotβ

C

MCQ: Cosα =

1. 1-2sin²α/2
2. 2cos²α/2+1
3. 2cos²α-1
4. 2cos²α-1

A