Question
What is the length of the arc that subtends an angle of measure at the centre of a circle with radius ?
What is the length of the arc that subtends an angle of measure at the centre of a circle with radius ?
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Apply fundamental law and its deductions to derive: Trigonometric ratios of allied angles, double angle, half angle and triple angle identities.
Recall complex number z represented by an expression of the form z = a + ib or of the form (a, b) where a and b are real numbers and i = √−1.