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18 December, 15:53

Find the slope of the curve r=cos (2theta) at theta=pi/6.

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  1. 18 December, 16:01
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    The slope is defined as the first derivative of the equation so,

    d (r) / d (theta) = - 2 sin (2theta)

    and by substitue by theta = pi/2

    we get slope = - 2 sin (2 * (pi/6))

    slope = - √3
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