Python ProgrammingMediumHigh School (11–12)High School (9–10)UndergraduateGeneralPython for Science and Maths › Trigonometry and Waves by Computer
Created by StemPy LabA check finds that an identity holds for many thousand random angles. What can you say?
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← A false rule for the cosine of a double angle is tested on five angles. What does this print? import numpy as np; a = np.radians(np.arange(0, 181, 45)); left = np.cos(2 * a); right = 2 * np.cos(a) - 1; print(np.allclose(left, right), int(np.sum(np.isclose(left, right))))The tangent of three angles, with the huge value hidden. What does this print? import numpy as np; x = np.radians([0, 45, 90]); t = np.tan(x); t[np.abs(t) > 8] = np.nan; print(int(np.isnan(t).sum()), round(float(t[1]), 1)) →
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