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bodasholesya
@bodasholesya
August 2022
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Найти значение sinx,cosx,tgx,ctgx; если:1)x=330°. 2)x=765°
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treezor
1) sin330°=sin(360°-30°)=-sin30°=-1/2
cos330°=cos(360°-30°)=cos30°=√3/2
tg330°=tg(360°-30°)=-tg30°=-√3/3
ctg330°=ctg(360°-30°)=-ctg30°=-√3
2) sin765°=sin(720°+45°)=sin45°=√2/2
cos765°=cos(720°+45°)=cos45°=√2/2
tg765°=tg(720°+45°)=tg45°=1
ctg765°=ctg(720°+45°)=ctg45°=1
Как то так вроде.
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Answers & Comments
cos330°=cos(360°-30°)=cos30°=√3/2
tg330°=tg(360°-30°)=-tg30°=-√3/3
ctg330°=ctg(360°-30°)=-ctg30°=-√3
2) sin765°=sin(720°+45°)=sin45°=√2/2
cos765°=cos(720°+45°)=cos45°=√2/2
tg765°=tg(720°+45°)=tg45°=1
ctg765°=ctg(720°+45°)=ctg45°=1
Как то так вроде.