Question

Cos(-x)-cosx= * срочна

Answer 1

Ответ: cos(-x)-cosx=cos(x)-cos(x)=0.

Пошаговое объяснение:

Answer 2

To solve the equation cos(-x) - cos(x) = 0, we can use the trigonometric identity that states cos(-x) = cos(x). By substituting this identity into the equation, we have:

cos(x) - cos(x) = 0

Since the two cosine terms cancel each other out, we are left with:

0 = 0

This equation is true for all values of x. Therefore, the solution to the equation cos(-x) - cos(x) = 0 is x ∈ ℝ, which means x can be any real number.