б и в прошу помогите упростить. Created by Lowliet. algebra-ru

б и в прошу помогите упростить...

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б и в прошу помогите упростить

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serovaevgesha Б)sin^2 15 + cos30=sin^2 15+1 - 2sin^2 15=1-sin^2 15=cos^2 15
в) cos(180-2x)/(sin x-cos x)=(cos 180* cos 2x+sin 180*sin 2x)/(sin x - cos x)=
-cos2x/(sin x - cos x)=( sin^2 x- cos^2 x)/(sin x - cos x)=sin x + cos x

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Answers & Comments

opredelite kolichestvo veshestva i massu oksida alyuminiya obrazovavshegosya pri vzai05a2e457a8ae5d943fea261d728f04fd 64252

pomogite s zadachej nuzhen grafik

napishite uravnenie polucheniya oksida zheleza iii reakciej razlozheniya

kakie gory obrazovalis v rossii v oblastyah mezozojskoj skladchatosti i kajnozojs

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sostavte uravnenie reakcii polucheniya nitrata magniya pri vzaimodejstvii 2 h oksi

1xdrob xv kvadrate2 nuzhno zadat v paskale

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