8.6. Inverse Trigonometric Ratios http://www.ck12.org
- sin 45◦=^3
3
√
2
=
√
2
2cos 45◦=^3
3√
2
=
√
2
2
tan 45◦=^33 = 1- The tangent of 45◦equals one because it is the ratio of the opposite side over the adjacent side. In an isosceles
right triangle, or 45-45-90 triangle, the opposite and adjacent sides are the same, making the ratio always 1.