Question

2 sina*sin a=2sin^2a?верно?

Answer 1

2 sin a в квадрате..............................

Answer 2

Checking the Equation

To verify if the equation 2sin(a)sin(a) = 2sin^2(a) is correct, let's break it down and analyze the components.

Understanding the Equation

The given equation is 2sin(a)sin(a) = 2sin^2(a).

Analysis

The equation can be simplified using trigonometric identities and properties. The identity sin^2(a) = (1 - cos(2a))/2 can be used to simplify the equation.

By substituting sin^2(a) = (1 - cos(2a))/2 into the equation, we get:

2sin(a)sin(a) = 2 * (1 - cos(2a))/2

Simplifying further:

sin(a)sin(a) = 1 - cos(2a)

This simplification shows that the given equation is not equivalent to 2sin^2(a).

Conclusion

The equation 2sin(a)sin(a) = 2sin^2(a) is not correct. The correct simplification of 2sin(a)sin(a) is sin(a)sin(a), which is equal to 1 - cos(2a).

Therefore, the given equation is not true.