Cos(9pi/4)
| Input |
|---|
| cos(9×pi/4) |
| Exact result |
| 1/sqrt(2) |
| Decimal approximation |
| 0.707106781186547524400844362104849039284835937688474036588… |
| Conversion from radians to degrees |
| cos(405 °) = cos(45 °) |
| Reference triangle for angle (9 π)/4 radians |
|
width | cos((9 pi)/4) = 1/sqrt(2)~~0.707107 height | sin((9 pi)/4) = 1/sqrt(2)~~0.707107 |
| Alternate form |
| sqrt(2)/2 |
| Continued fraction |
| [0; 1, 2^_] |