Question about Texas Instruments TI-81 Calculator
You need to be in the degree mode. To do this push the mode button on the calculator (mine is located near the directional keys). Go down three rows to where it displays RAD DEG. Move your cursor (which is blinking) to DEG and press enter. This will highlight the DEG mode press your 2nd then CLEAR button to Quit back to the main screen.
Posted on Nov 29, 2007
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Posted on Jan 02, 2017
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