Trigonometry close trigonometryThe study of sides and angles in triangles. can be used to find a missing angle in a right-angled triangle when two sides are known. An understanding of the three ...

We compute analytically the Green's and its gradient and product with linear functions on a triangle T in R3. Let x be an evaluation point, r(x,y) = |y-x| and Let h(x) be a linear function on the ...