I deeply consider that this is a very stimulating problem book that contains a variety of problems and their solutions. This book is of high interest to anyone who wishes to pursue research in elementary trigonometry and its applications. It is also excellent for students who want to enhance their skills in elementary mathematics to support their research in other fields such as geometry, algebra or mathematical analysis. Some of the problems contained in the book are also suitable for undergraduate students. I STRONGLY recommend this book to all who wish to find an excellent source of interesting and modern problems in trigonometry.
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