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Pre-Calculus-Please check

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Please check:
1.Find polar equation of x^2 + y^2 = 10y
subbed r^2 for x^2 + y^2 and sin(theta sin for y
=r^2=10sin(theta)
2. y=5
r=5/sin
3. x^2+y^2
=x^2 + y^2 =2x+3y

  • Pre-Calculus-Please check -

    1. r² = 10r sin θ
    r = 10 sin θ

    2. looks good

    3. r² = 2rcosθ + 3rsinθ
    r = 2cosθ + 3sinθ

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