Чему равен sin^2-1 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Question

Чему равен
sin^2-1 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Comments

Может так? sin^2 x-1=0

Answer 1

Sin 2x=2*sinx*cosx (синус двойного аргумента)