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Akishin18041
@Akishin18041
July 2022
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ekaterina2velikaya
1.
cos меньше 0, cos= -корень из(1-13/16)= -(корень из 3)/4
tg=sin/cos=корень из (13/3)
2.
а) cos^2 a(cos^2 a + sin^2 a)= cos^2 a * 1=cos^2 a
b) cos^2 *(sin^2/cos^2)+cos^2=sin^2=cos^2=1
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Answers & Comments
cos меньше 0, cos= -корень из(1-13/16)= -(корень из 3)/4
tg=sin/cos=корень из (13/3)
2.
а) cos^2 a(cos^2 a + sin^2 a)= cos^2 a * 1=cos^2 a
b) cos^2 *(sin^2/cos^2)+cos^2=sin^2=cos^2=1