Question

Как решить y=2cos2x?

Answer 1

У=1/2*арккосинус (х/2) -обратная функция для y=2cos2x

Answer 2

Solving the Equation y=2cos2x

To solve the equation y=2cos2x, we can follow these steps:

1. Isolate the Cosine Function: - First, isolate the cosine function by dividing both sides of the equation by 2: cos2x = y/2.

2. Find the Inverse Cosine: - To solve for x, take the inverse cosine of both sides to get the value of 2x: 2x = arccos(y/2).

3. Simplify and Solve for x: - Finally, divide the result by 2 to solve for x: x = (1/2) * arccos(y/2).

The solution to the equation y=2cos2x is x = (1/2) * arccos(y/2).

[[9 #]] provides information on solving the equation involving cos2x.