GRADE 12 MATH · CHAPTER 1
Trigonometry
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Trigonometry
Convert degrees to exact radians
Express common degree angle measurements as exact multiples of π radians.
Trigonometry
Read exact sine values on the unit circle
Use a unit-circle point’s vertical coordinate to determine sine, including its sign.
AN EXAMPLE FROM THIS CHAPTER
Convert 30° to radians. Give an exact answer.
Show answer & explanation
π/6 rad
A half turn is 180° or π radians. Multiply 30 by π/180 to get π/6 rad.
Curriculum & source notes
These are original Little Play study books organized around U.S. school topics. The official curriculum references below guide topic scope and progression. Coverage is selected, not a complete curriculum or a verified match to every state standard. They are not copies of a publisher’s textbook. Check your school’s syllabus and book edition.
High-school courses can be taken in different years. Choose the topic that matches the student’s current course.
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