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10 cards from this deck
Angle measured upward from horizontal line
Angle measured downward from horizontal line
Horizontal line, never from vertical
They are equal to each other
Form alternate angles between parallel horizontal lines
tanθ=oppositeadjacent\tan \theta = \frac{\text{opposite}}{\text{adjacent}}tanθ=adjacentopposite
When you have/need opposite and adjacent sides
sinθ=oppositehypotenuse\sin \theta = \frac{\text{opposite}}{\text{hypotenuse}}sinθ=hypotenuseopposite
When you have/need opposite side and hypotenuse
Degree mode
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