Uca lactea lactea and the first cosine rule![]()
In the first cosine rule upper case, small letter comes mixed together. In fact, the edge refers to case and upper case refers to the angle. First cosine rule is like a uca lactea lactea mismatched claw shape. Body itself of crab is the cosine.
A sandy beach is a blackboard.
Wave is the eraser.
Wave is the eraser.
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