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wrtx394
@wrtx394
October 2021
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вычислите синусы косинусы и тангенсы углов 120 135 150
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Sin120=sin(180-60)=sin60=√3/2
cos120=cos(180-60)=-cos60=-1/2
tg120=sin120/cos120=(√3/2):(1/2)=√3
sin135=sin(90+45)=cos45=√2/2
cos135=cos(90+45)=-sin45=-√2/2
tg135=sin135/cos135=(√2/2):(-√2/2)=-1
sin150=sin(180-30)=sin30=1/2
cos150=cos(180-30)=-cos30=-√3/2
tg150=sin150/cos150=(1/2):(-√3/2)=-1/√3=-√3/3
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Answers & Comments
Verified answer
Sin120=sin(180-60)=sin60=√3/2cos120=cos(180-60)=-cos60=-1/2
tg120=sin120/cos120=(√3/2):(1/2)=√3
sin135=sin(90+45)=cos45=√2/2
cos135=cos(90+45)=-sin45=-√2/2
tg135=sin135/cos135=(√2/2):(-√2/2)=-1
sin150=sin(180-30)=sin30=1/2
cos150=cos(180-30)=-cos30=-√3/2
tg150=sin150/cos150=(1/2):(-√3/2)=-1/√3=-√3/3