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Quadrantal angles (0, 90, 180, and 270 degrees), and the values of the sine, cosine, and tangent of each of these angles. From the trig lessons in the Algebr... Quadrantal angles (0, 90, 180, and 270 degrees), and the values of the sine, cosine, and tangent of each of these angles. From the trig lessons in the Algebra 2 course by Derek Owens.
Best Answer: If the mode is degrees, any angle is assumed to be measured degrees when working with trigonometric functions. 360 degrees = a complete circle. If the mode is set to radians, the angle is assumed to be measured in radians where 2Ï radians is a complete circle. If the mode is set to grads, the angle is assumed to be measured in grads where 100 grads is a right angle, or 400 grads is a complete circle.