4 ms·
In the first paragraph under “Deriving lengths of the sides of the smaller triangle”, how do we know the length of the third side is 2a^2/b ?
by School-Cotton 4y ago
In the first paragraph under “Deriving lengths of the sides of the smaller triangle”, how do we know the length of the third side is 2a^2/b ?
- mathteddybear 4y ago"This" in "This leads to the third side of this triangle to be 2a²/b." means "the same line of reasoning". it's not even trigonometry in that paragraph, just rudimentary proportions of similar triangles
- deleted 4y ago[deleted]
- n3uromancer 4y agoFrom cosβ = a/c and cosβ = third side/((2ac)/b)