Find the polar equation for the curve x² + y² =9.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter11: Topics From Analytic Geometry
Section: Chapter Questions
Problem 53RE
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Find the polar equation for the curve x² + y² = 9.
Transcribed Image Text:Find the polar equation for the curve x² + y² = 9.
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I can't see the rest of your step 2 calculation answer... Can you resend it?

Step 2: calculation
→ x² + y² = 9put x = rcos and y = rsine ⇒
(rcose)² + (rsinė)² = 9
7.² (cos²0 + sin²0) = 9we know si
r²cos²0 +r² sin²0 = 9 r²
Transcribed Image Text:Step 2: calculation → x² + y² = 9put x = rcos and y = rsine ⇒ (rcose)² + (rsinė)² = 9 7.² (cos²0 + sin²0) = 9we know si r²cos²0 +r² sin²0 = 9 r²
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