Kumon is a self-learning method. Instructors do not "teach" in the traditional sense; they guide. For highly abstract concepts like imaginary numbers or double-angle formulas, many students feel that self-learning is insufficient. The solution book acts as a surrogate teacher.
If you have managed to get your hands on a legitimate (or homemade) solution booklet for Level O, follow this strict protocol:
The 3-Try Rule
The "Whiteout" Method Take the solution book. Use whiteout to erase the "middle steps" of 10 problems. Photocopy it. Now, try to fill in the missing steps yourself. This turns the solution book into a practice test. kumon math level o solution book
This section introduces formulas that allow the calculation of trig values for angles that are sums or differences (like $15^\circ$ or $75^\circ$) using known standard angles.
Key Concepts:
Here is the first truth bomb: Kumon does not sell an official "Kumon Math Level O Solution Book" to the general public. Kumon is a self-learning method
Kumon North America (and its international affiliates) maintains strict copyright controls over its answer books. These are reserved exclusively for Kumon instructors (Gakushu Choushoku) to grade student work. You cannot walk into a bookstore or log onto Amazon to buy a legitimate, official Level O answer key.
So, what are people referring to when they search for this term?
Believe it or not, most Kumon instructors want you to succeed at Level O. Ask your center owner directly: The "Whiteout" Method Take the solution book
"I am stuck on Oa 186 (Taylor Series remainder). Can you photocopy just the solution steps for this specific page from your instructor book?"
Many instructors will oblige for 2-3 pages. They will not give you the entire 200-page book, but they will unstick you.