Lesson 15: Radian Measure
Learning Goals: By the end of this lesson you will be able to
Explain what radian measure is, and apply radian measure in familiar calculations.
Make connections between trigonometric ratios and the graphical and algebraic representations of the
corresponding trig functions and their reciprocals, and use these connections to solve problems.
Success Criteria: By the end of this lesson you will be able to
Recognize the radian as an alternative unit to the degree for angle measures, define the radian measure of an angle in terms of arc length, and convert between radian and degree measures.
• Represent radian measure in terms of pi.
• Determine the primary trigonometric ratios and reciprocal trigonometric ratios of angles expressed in radian
measure.
