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KolyaPochtarev
@KolyaPochtarev
October 2021
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Срочно помогите решить БВГ в 1 номере и объяснить!! Не могу понять, как решать!
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pomoshnik09
B) =(cosa-sina)/ √2(sinπ/4cosa-cosπ/4sina) = (cosa-sina) / √2(√2/2cosa-√2/2*sina) = (cjsa-sina) / √2* √2/2(cosa-sina) =(cosa-sina) / (cosa-sina)=1
3) =cos10-√3sin10) /sin10cos10 =(умножим числитель и знаменатель на 1/2)= (1/2cos10-√3/2sin10) / (1/2sin10cos10 )= (sin30cos10-cos30sin10) /
/ (1/2sin10cos10 = 4*sin(30-10) /4* 1/2sin10cos10= 4sin20 /2sin10cos10 =
=4sin20/sin20=4
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Answers & Comments
3) =cos10-√3sin10) /sin10cos10 =(умножим числитель и знаменатель на 1/2)= (1/2cos10-√3/2sin10) / (1/2sin10cos10 )= (sin30cos10-cos30sin10) /
/ (1/2sin10cos10 = 4*sin(30-10) /4* 1/2sin10cos10= 4sin20 /2sin10cos10 =
=4sin20/sin20=4