Pythagorean trigonometric identity
Автор:
Jesse Russell,Ronald Cohn, издатель:
"VSD", ISBN:
978-5-5110-8567-8
High Quality Content by WIKIPEDIA articles! The Pythagorean trigonometric identity is a trigonometric identity expressing the Pythagorean theorem in terms of trigonometric functions. Along with the sum-of-angles formulae, it is one the basic relations betw