We can only do this if we have a right triangle.....assuming that a and b are legs, we have
tanA = 16/26 ..... therefore.........
tan-1 (16/26) = A = about 31.6°
If b is a hypotenuse, we have
sinA = (16 / 26) therefore
sin-1 (16/26) = A = about 37.98°
