Author Topic: The meaning of cos? and sin?  (Read 19200 times)

Fu-Kwun Hwang

  • Administrator
  • Hero Member
  • *****
  • Posts: 3062
    • Enjoy the fun of physics with simulations
The meaning of cos? and sin?
« on: October 13, 2014, 08:28:41 pm »
You can drag the tip of blue of red arrow to change the angle.

Full screen applet or Problem viewing java?Add to exception site list
Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop. This work is licensed under a Creative Commons Attribution 2.5 Taiwan License
  • Please feel free to post your ideas about how to use the simulation for better teaching and learning.
  • Post questions to be asked to help students to think, to explore.
  • Upload worksheets as attached files to share with more users.
Let's work together. We can help more users understand physics conceptually and enjoy the fun of learning physics!


  • Hero Member
  • *****
  • Posts: 1772
    • lookang web
« Last Edit: November 01, 2014, 02:16:31 pm by lookang »


  • Newbie
  • *
  • Posts: 1
Re: The meaning of cos? and sin?
« Reply #2 on: January 16, 2015, 03:05:26 pm »
An angle is the figure formed by two rays sharing a common endpoint, called the vertex of the angle. Angles provide a means of expressing the difference in slope between two rays meeting at a vertex without the need to explicitly define the slopes of the two rays. Angles are studied in geometry and trigonometry.
sin theta is = to opposite/hypotenuse.
cos theta is = to adjacent/hypotenuse.
tan theta is = to opposite/ adjacent. -*-