Question

cos²x-3=0 срочно помогите

Answer 1

 cos²x=3
 cosx=+/-корень из 3
 х=+/-arccos(корень из 3)+2пn, n принадлежит Z
насколько я помню, это решается так..

Answer 2

Solving the Equation cos²x - 3 = 0

To solve the equation cos²x - 3 = 0, we can use the trigonometric identity cos²x = 1 - sin²x to rewrite the equation as 1 - sin²x - 3 = 0. Then, we can solve for sin²x and subsequently for sinx.

1. Rewrite the Equation Using the Trigonometric Identity: - cos²x - 3 = 0 - 1 - sin²x - 3 = 0 2. Solve for sin²x: - -sin²x = 2 - sin²x = -2

3. Solve for sinx: - Since sin²x = -2 has no real solutions (as the square of a real number cannot be negative), the equation cos²x - 3 = 0 has no real solutions for x.

Therefore, the equation cos²x - 3 = 0 has no real solutions for x.

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