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Precalculus help please?

Make the indicated trigonometric substitution in the given algebraic expression and simplify.

Square root of 9-x^2

X=3sin(theta)

1 Answer

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  • fcas80
    Lv 7
    7 years ago
    Favorite Answer

    9-(3sin(theta))^2

    9 - 9 sin^2(theta)

    9(1- sin^2(theta))

    9cos^2(theta)

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