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^_] |