30 Мая 2021 в 19:41
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Ответы
1

To solve this equation, we first need to rewrite it in terms of the same trigonometric function.

Given:

3 + sin(2x) = 4sin^2(x)

Recall the double angle identity for sine: sin(2x) = 2sin(x)cos(x)

Now substitute sin(2x) with 2sin(x)cos(x) in the equation:

3 + 2sin(x)cos(x) = 4sin^2(x)

Rearrange the equation to set it equal to zero:

4sin^2(x) - 2sin(x)cos(x) - 3 = 0

Now, we can use the trigonometric identity sin^2(x) + cos^2(x) = 1 to further simplify the equation:

4(1 - cos^2(x)) - 2sin(x)cos(x) - 3 = 0
4 - 4cos^2(x) - 2sin(x)cos(x) - 3 = 0
1 - 4cos^2(x) - 2sin(x)cos(x) = 0

Since cos(2x) = 1 - 2sin^2(x), we can also express cos^2(x) in terms of sin(x):

1 - 4(1 - 2sin^2(x)) - 2sin(x)cos(x) = 0
1 - 4 + 8sin^2(x) - 2sin(x)cos(x) = 0
-3 + 8sin^2(x) - 2sin(x)cos(x) = 0

This implies that 8sin^2(x) - 2sin(x)cos(x) + 3 = 0.

Further solving this equation involves finding the roots of this quadratic equation in sin(x) or cos(x) before finding the values of x in the original equation.

17 Апр 2024 в 17:49
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