Question

-2 cos x - 3cos x= ​

Answer 1

Ответ:

$- 2 \cos(x) - 3 \cos(x) = - 5 \cos(x)$

~•~•~•ZLOY_TIGROVSKIY~•~•~•

Answer 2

Пошаговое объяснение:

$- 2 \cos(x) - 3 \cos(x) \\ ( - 2 - 3) \times \cos(x) \\ - 5 \cos(x)$

Answer 3

To solve the equation -2cos(x) - 3cos(x) = 0, we'll start by combining like terms:

-2cos(x) - 3cos(x) = -5cos(x) = 0

Now, we want to find the value of x that satisfies this equation. To do that, we need to isolate cos(x) on one side of the equation:

-5cos(x) = 0

To isolate cos(x), divide both sides by -5:

cos(x) = 0

Now, we want to find the values of x that make cos(x) equal to 0. In trigonometry, these values are known as the "zeros" or "roots" of the cosine function.

The cosine function has a zero at every multiple of π/2 (90 degrees). So, the solutions for x are:

x = π/2 + nπ (n is an integer)

This means that x can take values like π/2, 3π/2, 5π/2, -π/2, -3π/2, -5π/2, and so on. In each case, the cosine of these angles will be 0, satisfying the equation -2cos(x) - 3cos(x) = 0.