Find the slope of the tangent to the curve r=9+6cosθ at the value θ = π/2
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Originally Posted by muddyjch Find the slope of the tangent to the curve r=9+6cosθ at the value θ = π/2 Re-write the equation in parametric form:
Then the slope is calculated by
Expand the terms before differentiation. Use product rule and chain rule.
Plug in . I've got as the final result
Last edited by earboth; July 21st 2010 at 10:57 PM.
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