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The trigonometric functions don seem to work correctly. Whats wrong?

April 26, 2017correctly functions trigonometric wrong

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The trigonometric functions don seem to work correctly. Whats wrong?

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A. By default, AllerCalc is set to the “Radian” mode for angle measurements. To set AllerCalc to the “Degree” mode, use the Options menu. In “Degree” mode, sin(30) = 0.5, whereas in “Radian” mode, sin(30) = -0.988.