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Math Help - Help with area enclosed by curve

  1. #1
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    Help with area enclosed by curve

    x(t) = cos t and y(t) = sin t cos t.

    I know that by symmetry, I just take 4 times the area in the first quadrant.
    4 {integral 0 to pi/2} f(t)dt
    But I don't know how to set up the function.

    Thanks in advance.
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  2. #2
    Math Engineering Student
    Krizalid's Avatar
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    \sqrt{\left( \frac{dx}{dt} \right)^{2}+\left( \frac{dy}{dt} \right)^{2}}.
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