Chapter 3 Multiple choice questions

* not completed

. Which of the following is not true?

Angle = arc-length / radius. correct incorrect

A radian is 180/π degrees. correct incorrect

The angle depends on the units in which lengths are measured. correct incorrect

A right-angle is π/2 radians. correct incorrect

* not completed

. Which of the following is not true about trigonometric functions?

They are periodic. correct incorrect

They are related to the ratios of the sides of a right-angled triangle. correct incorrect

sin(Ω) = cos(90º-Ω) for 0 =Ω = 90º. correct incorrect

cos(0) = 0 correct incorrect

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. For a small angle, |Ω|«1 (radian), which of the following is not true?

sin(Ω) ≈ Ω correct incorrect

cos(Ω) ≈ Ω correct incorrect

tan(Ω) ≈ Ω correct incorrect

tan(Ω) = sin(Ω) / cos(Ω) correct incorrect

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. A sin(Ω) + B cos(Ω) = µ sin(Ω+ø) where

µ² = A² + B² and tan(ø) = B/A. correct incorrect

µ² = A² + B² and tan(ø) = A/B. correct incorrect

µ = A + B and tan(ø) = B/A. correct incorrect

µ = A + B and tan(ø) = A/B. correct incorrect

* not completed

. Which of the following is not true?

cos(2Ω) = cos²(Ω) - sin²(Ω) correct incorrect

cos(2Ω) = 2 cos²(Ω) - 1 correct incorrect

cos(2Ω) = 1- 2 sin²(Ω) correct incorrect

tan(2Ω) = 2 cos(Ω) sin(Ω) correct incorrect