TI 84 - Trig graph isn't working - Why is my trig graph a straight line?

Why is my sine or cosine graph showing up as a straight line? This is a common issue when using your GDC (graphical display calculator). The problem is actually an easy fix, you're just in the wrong mode for measuring angles. You are using degrees instead of using radians.

The reason that it is showing up as a straight line is because if you are graphing something in degrees when it should be in radians, you are looking at a degree scale (which should go to 360), but you are only viewing the first 10 or so degrees of that 360. Note that this would be the full cycle of radians since 2π is only 6.28.

So chances are, you just need to switch your mode.

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Legal Disclaimer: This video/channel is not affiliated with or sponsored by the International Baccalaureate. It is a channel based on my 10+ years of teaching IB SL Math. While I believe that with the right amount of time, effort and studying strategies, anyone has the potential to earn a 5 on their IB Math exam, individual results may vary.

[tiffanymoose]

This did not work for me. Still getting a straight line. Suggestions?

[nico_mas]

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