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10 cards from this deck
yr\frac{y}{r}ry
xr\frac{x}{r}rx
yx\frac{y}{x}xy
r2=x2+y2r^2 = x^2 + y^2r2=x2+y2
Always positive (represents distance)
All ratios
Sin and cosec
Tan and cot
Cos and sec
111
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