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DS second degré - isa.gache : exercices de trigo.
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| angle | cos | sin |  |
| −x | cos(−x) = cos(x) fonction paire |
sin(−x) = −sin(x) fonction impaire |
|
| x + π/2 | cos(x + π/2) = −sin(x) | sin(x + π/2) = cos(x) | |
| x + π | cos(x + π) = −cos(x) | sin(x + π) = −sin(x) | |
| x − π/2 | cos(x − π/2) = sin(x) | sin(x − π/2) = −cos(x) | |
| x − π | cos(x − π) = −cos(x) | sin(x − π) = −sin(x) | |
| π/2 − x | cos(π/2 − x) = sin(x) | sin(π/2 − x) = cos(x) | |
| π − x | cos(π − x) = −cos(x) | sin(π − x) = sin(x) | |
| −π/2 − x | cos(−π/2 − x) = −sin(x) | sin(−π/2 − x) = −cos(x) |