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Seja f left parenthesis x right parenthesis equals fraction numerator sin invisible function application left parenthesis x right parenthesis over ...

Seja f left parenthesis x right parenthesis equals fraction numerator sin invisible function application left parenthesis x right parenthesis over denominator square root of 2 minus cos invisible function application left parenthesis x right parenthesis end root end fraction Determine a integral indefinida de f left parenthesis x right parenthesis. a. integral f left parenthesis x right parenthesis d x equals 2 square root of 2 minus cos invisible function application left parenthesis x right parenthesis end root plus c b. integral f left parenthesis x right parenthesis d x equals 2 cot invisible function application left parenthesis x right parenthesis square root of 2 minus cos invisible function application left parenthesis x right parenthesis end root plus c c. integral f left parenthesis x right parenthesis d x equals fraction numerator sin squared invisible function application left parenthesis x right parenthesis over denominator 4 minus 2 cos invisible function application left parenthesis x right parenthesis end fraction plus c d. integral f left parenthesis x right parenthesis d x equals negative 2 square root of 2 minus cos invisible function application left parenthesis x right parenthesis end root plus c e. integral f left parenthesis x right parenthesis d x equals sin invisible function application left parenthesis x right parenthesis square root of 2 minus cos invisible function application left parenthesis x right parenthesis end root plus c

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Para resolver essa questão, podemos utilizar a técnica de substituição trigonométrica. Substituindo x por arccos(u), temos: dx = -1 / sqrt(1 - u^2) du sin(x) = sin(arccos(u)) = sqrt(1 - u^2) Substituindo na integral, temos: integral [sin(x) / sqrt(2 - cos(x))] dx = integral [sqrt(1 - u^2) / sqrt(2 - u)] (-1 / sqrt(1 - u^2)) du = -integral [1 / sqrt(2 - u)] du = -2 * sqrt(2 - u) + C = -2 * sqrt(2 - cos(x)) + C Portanto, a alternativa correta é a letra d) integral f(x) dx = -2 * sqrt(2 - cos(x)) + C.

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