|cosx| / cosx - 2 = 2sinx

Предыдущий
вопрос Следующий
вопрос

To solve this equation, we can first simplify the absolute value term.

Since |cosx| is equal to cosx when cosx is positive and -cosx when cosx is negative, we can split the equation into two cases:

Case 1: cosx is positive
We have |cosx| = cosx
So, cosx / cosx - 2 = 2sinx
1 / 1 - 2 = 2sinx
1 / -1 = 2sinx
-1 = 2sinx
sinx = -1/2

The solutions in this case are x = -π/6 + 2nπ or x = 5π/6 + 2nπ, where n is an integer.

Case 2: cosx is negative
We have |cosx| = -cosx
So, -cosx / cosx - 2 = 2sinx
1 / 1 - 2 = 2sinx
1 / -1 = 2sinx
-1 = 2sinx
sinx = -1/2

The solutions in this case are x = 7π/6 + 2nπ or x = 11π/6 + 2nπ, where n is an integer.

Therefore, the solutions to the equation |cosx| / cosx - 2 = 2sinx are x = -π/6 + 2nπ, x = 5π/6 + 2nπ, x = 7π/6 + 2nπ, and x = 11π/6 + 2nπ, where n is an integer.