Can the
length 5cm, 9 cm and 13 cm be the dimensions of a triangle

If m 17 27 90 63 ** picture is attached

List x1, x2, x3, x4 where xi is the midpoint endpoint of the five equal intervals used to estimate the area under the curve of f(x) between x = 0 and x = 10.

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota