Ответ:
tg(П+t)=tg(t)=21/20
Пошаговое объяснение:
tg(П+t)=tg(t)
sin(4П+t)=sin(t)
tg(t)=sqrt(sin^2(t)/(1-sin^2(t)))
tg(t)=sqrt((21/29)^2/((29^2-21^2)/29^2))
tg(t)=sqrt(21^2/(29^2-21^2))=
=sqrt(21^2/(8×50))=21/20
<span>13/40*7=(13*7</span>)/40=91/40=2 11/40
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<span>9*16/35=(9*16)/35=144/35</span>=4 4/35
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<span>19/30*11=(19*11)/30=209/30=6 29/30
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8*15/41</span>=(8*15)/41=120/41=2 38/41
(b+179)-89= b+90
При b=56
56+90=146
При b=75
75+90=165
<span>3x+8=47
</span><span>3x=47-8
</span><span>3x=39
х=39 :3
х=13
3*13+8=47</span>