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Guzelya01
@Guzelya01
August 2022
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Помогите решить!Срочно!!!Вычислите 1+cos П/6+ cos2 П/6+cos3 П/6
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mmb1
Verified answer
1+cos П/6+ cos2 П/6+cos3 П/6
cos pi/6=
√3/2
cos 2 pi/6= cos pi/3= 1/2
cos 3 pi/6=cos pi/2 =0
1+√3/2+1/2+0=3/2+√3/2
-------------------------------
1+cos pi/6 +cos² pi/6 + cos³ pi/6=1+√3/2+(√3/2)²+(√3/2)³=1+√3/2+3/4+3√3/8=7/4+7/8*√3
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Answers & Comments
Verified answer
1+cos П/6+ cos2 П/6+cos3 П/6cos pi/6=√3/2
cos 2 pi/6= cos pi/3= 1/2
cos 3 pi/6=cos pi/2 =0
1+√3/2+1/2+0=3/2+√3/2
-------------------------------
1+cos pi/6 +cos² pi/6 + cos³ pi/6=1+√3/2+(√3/2)²+(√3/2)³=1+√3/2+3/4+3√3/8=7/4+7/8*√3