Question about Texas Instruments TI-89 Calculator
You have your angular mode set to degrees. Ten degrees is about 0.17 radians, and for small x: sin(x) is nearly equal to x. Thus, sin(x) from -10 to 10 is indeed nearly a straight diagonal line.
Press MODE, then scroll down to "Angle" to change the angular mode.
Posted on Jun 03, 2010
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Posted on Jan 02, 2017
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