Parametric Equation for a Curve with Cosine and Sine Functions

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SUMMARY

The discussion focuses on deriving the equation for the parametric curve defined by x = cos(θ) and y = cos(θ) + sin²(θ). The key approach involves substituting x into the equation for y using the trigonometric identity sin²(θ) = 1 - cos²(θ). By substituting cos(θ) with x, the equation simplifies to y = x + (1 - x²), leading to the final equation y = 1 - x² + x.

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Homework Statement



Find an equation y=f(x) for the parametric curve x = cos (theta) y = cos (theta) + sin^(2) (theta)

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The Attempt at a Solution


I know I need to solve for theta but I'm not sure how to go about this. Can I plug x into the theta's in y or do I use the trig identity sin^(2) + cos^(2) = 1? Thanks in advance!
 
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Use the fact that [itex]\cos\theta=x[/itex] and [itex]\sin^2\theta=1-\cos^2\theta[/itex].
 

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