cos(−11/4pi)
blazej: cos(−11/4pi) = ? mi wychodzi √2/2 a ma wyjść −√2/2
2 gru 13:36
Basia:
| −11π | | −8π+3π | | 3π | |
| = |
| = −2π+ |
| |
| 4 | | 4 | | 4 | |
cos
−11π4 = cos
3π4 = cos(π−
π4) = −cos
π4
2 gru 13:40
blazej: a mój zapis Basia? cos(−11/4pi) = −cos(11/4pi) = −cos(3pi−pi/4)= √2/2
2 gru 13:43
2 gru 13:46