Some calculators even have a legend at the top or bottom of the screen that tells you whether youre in degree or radian mode, perhaps as obvious as an R or D. Problems tend to arise when you use your calculator for more than one task. The technically correct thing to do is to assume that everything is in radians unless otherwise specified. He cofounded the TI-Nspire SuperUser group, and received the Presidential Award for Excellence in Science & Mathematics Teaching.
C.C. Edwards is an educator who has presented numerous workshops on using TI calculators.
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