Comments by "Fhf Fhf" (@fhffhff) on "Tamara Eidelman" channel.

  1. $(0;π/2)(lncosx*ctgx*lnlnsinx-lnlnc osx*lncosx*ctgx)dx=lncosx(lnsinxlnsimx-lnsinx)+$tgx(lnsinxlnsimx-lnsi nx)dx(0;π/2)+lnu*u²/2-u²/4(0;-∞)= ∞+$(0;π/2)tgx(ln²sinx-lnsinx)dx=∞
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  2. 7x√(625-x²)=7500-24x² x=15
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  3. arcsin²√x(0;1)=(π/4)²-0=π²/16
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  4. a/(a+b)*1/3l3 2a/(a+b)-1=a/(a+b) *1/3 a=3/4b S∆=29,4
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