Ответ:
1
Объяснение:
=
1)sin(765°)=sin(45°+2×360°)=sin(45°)=√2/2
2)cos(420°)=cos(60°+360°)=cos(60°)=1/2
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Ответ:
1
Объяснение:
1)sin(765°)=sin(45°+2×360°)=sin(45°)=√2/2
2)cos(420°)=cos(60°+360°)=cos(60°)=1/2