Straight Lines Quiz

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Questions and Answers

What is the correct formula for finding the slope, m, of a line with inclination θ?

  • $m = \frac{1 - \tan \theta}{1 + \tan \theta}$
  • $m = \frac{\tan \theta}{1 + \tan \theta}$
  • $m = \frac{1 + \tan \theta}{1 - \tan \theta}$
  • $m = \tan \theta$ (correct)

If the slope of the y-axis is not defined, what is the slope of the x-axis?

  • One
  • Zero (correct)
  • Undefined
  • Infinity

What is the formula for finding the angle φ between two lines with slopes m1 and m2?

  • $\tan \phi = (m2+m1)/(1-m1m2)$
  • $\tan \phi = -(m2+m1)/(1-m1m2)$
  • $\tan \phi = -(m2-m1)/(1+m1m2)$ (correct)
  • $\tan \phi = (m2-m1)/(1+m1m2)$

If (m2-m1)/(1+m1m2) is positive, what can be inferred about the angles θ and φ between the lines?

<p>θ will be acute and φ will be obtuse (C)</p> Signup and view all the answers

What is the relation between the slopes m1 and m2 and the angles α1 and α2 of two non-vertical lines L1 and L2?

<p>$m1 = \tan \alpha1$, $m2 = \tan \alpha2$ (D)</p> Signup and view all the answers

Which major subdiscipline of modern mathematics is primarily concerned with the study of properties and relationships of numbers?

<p>Number theory (D)</p> Signup and view all the answers

In modern mathematics, which entities are stipulated to have certain properties and are used as starting points for theories?

<p>Abstract objects with certain properties called axioms (A)</p> Signup and view all the answers

What type of reasoning is primarily used in mathematics to prove properties of abstract objects?

<p>Pure reason (C)</p> Signup and view all the answers

Which area of mathematics is developed in close correlation with its applications in fields such as economics, biology, and political science?

<p>Statistics (A)</p> Signup and view all the answers

What is the fundamental characteristic of the truths of mathematics in relation to scientific experimentation?

<p>Independent from any scientific experimentation (D)</p> Signup and view all the answers

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