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Angle addition and subtraction

Sine, cosine and tangent of a ± b; exact values of 15°, 75°, 105° and 165°

The Angle addition and subtraction unit belongs to the Functions and polynomials section of Math Mental and has 11 lessons: sine, cosine and tangent of a ± b; exact values of 15°, 75°, 105° and 165°.

Practice this unit

Lessons in this unit

  1. Sine and cosine formulas Lesson, 8 questions
  2. Sine of a sum of notable arcs Lesson, 8 questions
  3. Sine of sums and differences Lesson, 8 questions
  4. Cosine of sums and differences Lesson, 8 questions
  5. The tangent formula Lesson, 8 questions
  6. Tangent of 15°, 75° and 105° Lesson, 8 questions
  7. Practice: exact values Practice, 12 questions
  8. Sine of a sum from given values Lesson, 8 questions
  9. Cosine of a sum from given values Lesson, 8 questions
  10. Tangent of a sum from given values Lesson, 8 questions
  11. Unit test 12 questions

This unit in numbers

9 lessons, 1 practice, and 1 test, with 96 questions in total.

It starts with “Sine and cosine formulas” and ends with “Tangent of a sum from given values”.

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