MATA30H3 Lecture Notes - List Of Trigonometric Identities, Unit Circle
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MATA30H3 Full Course Notes
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Angle x is defined as the length, a, the arc that extends the angle divided by the radius, r, of the circle: x = a/r. 2 pi rad = 360 degrees or pi rad = 180 degrees. To convert degrees to radians, multiply degree measure with pi/180. To convert radian measure to degrees, multiply radian measure with 180/pi. You can use a calculator to calculate trigonometric ratios for an angle expressed in radian measure by setting the angle mode to radians. You can determine the reciprocal trigonometric ratios for an angle expressed in radian measure by first calculating the primary trigonometric ratios then using the reciprocal key on the calculator. You can also use the unit circle and special triangles to determine exact values for the trigonometric ratios of the special angles 0, pi/6, pi/3. You can use the unit circle along with the cast rule to determine exact values for the trigonometric ratios of multiples of the special angles.
