Polar Emi, Grace, Susan.

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Presentation transcript:

Polar Emi, Grace, Susan

Card 69: Common Polar Graphs/Equations (1/3)

Card 69: Common Polar Graphs/Equations (2/3) n petals if n is odd, 2n petals if n is even

Card 69: Common Polar Graphs/Equations (3/3)

Card 70: Polar Conversion Formulas x2+y2=r2 or r=√(x2+y2) y=rsin𝛳 or sin𝛳=y/r x=rcos𝛳 or cos𝛳=x/r tan𝛳=y/x or 𝛳=tan-1(y/x)

Card 71: Power Reducing Identities

Card 72: Finding Polar Area

Card 73: Arc Length (Polar)

Card 74: Finding dy/dx (Polar) *don’t forget product rule!

Card 75: Tangent Line (Polar) Find the slope at the given 𝜃, using the formula: Find r and r ’ Plug in given 𝜃 into r and r’ Plug values of r and r’ into the slope formula above Solve for slope Plug the slope and point at 𝜃 into the point slope form of a tangent line:

Card 76: Interpreting Motion (Polar) Particle motion in polar is determined by the rate of the r(𝜃) function: If > 0 then the particle is moving away from the origin If < 0 then the particle is moving towards the pole (origin) If = 0 then the particle’s position MAY be at a maximum distance from the pole (origin) **particle’s distance from the origin is not changing** **the curve is moving away from the origin; r is increasing (when asked about r or the curve) **the curve is approaching the origin; r is decreasing

Homework: Polar Packet: MC: #8 FRQ: #10