Solving trigonometric equations in radians (extension) To solve trigonometric equations involving radian measure, you should proceed in the same way as for degreesThe tangent calculator allows through the tan function to calculate online the tangent of an angle in radians, you must first select the desired unit by clicking on the options button calculation module After that, you can start your calculations To calculate tangent online of π 6, enter tan ( π 6), after calculation, the result 3 3 isWe draw a graph of tanu over this interval as shown in Figure 4 90 180 360 5401 135 315 495 1 45 tan€ u u o o o o Figure 4 A graph of tanu We know from the Table on page 2 that an angle whose tangent is 1 is 45 , so using the symmetry in the graph we can find the angles which have a tangent equal to −1 The first will be the same
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