Parametric stuff Flashcards by o o

Q

sin²θ from double angle formula

A

start from cos2θ = 1-2sin²θ
sin²θ = 1-cos2θ / 2

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Q

cos²θ from double angle formula

A

start from cos2θ = 2cos²θ - 1
cos² = 1+cos2θ / 2

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