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angelcastiel2508
@angelcastiel2508
July 2022
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а)
cos п + ctg(4п/3)
б) tg п/4 ctg (-п/4) + cos 3п/2 sin п/2
в) sin 405 + cos 225 tg 225
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lilyvamp
Verified answer
а) cosп +ctg 4п/3 = -1+корень из 3/3= корень из 3-3/3
б) tgп/4ctg(-п/4)+cos3п/2sinп/2= -1+0=-1
в) sin405+cos225*tg225=sin405+cos225*sin225/cos225=sin(360+45)+sin(180+45)=sin45-sin45=o
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Answers & Comments
Verified answer
а) cosп +ctg 4п/3 = -1+корень из 3/3= корень из 3-3/3
б) tgп/4ctg(-п/4)+cos3п/2sinп/2= -1+0=-1
в) sin405+cos225*tg225=sin405+cos225*sin225/cos225=sin(360+45)+sin(180+45)=sin45-sin45=o