F(x) = -2cos(2x-П) + с
M(П/2;3)
3 = -2cos(2*П/2-П) + c
3 = -2cos0 + c
c = 3+2cos0 = 5
F(x) = -2cos(2x-П) + 5
файл
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<span><span>1)4a^3b-6a^2b^2= 2a^2b(2</span>а-3b)</span><span>2)5x^2y+10xy^2<span> =</span>5x<span>у(х+2у)
3)14</span>m^3-21m^2n^3=7m^2n(2m-3n<span>)
4)5</span>x^3-15x^2y+20xy^2=5x(x^2-3хy<span>+4у^2)
5)2</span>a^2y-6ay^2+8y=2у(a^2<span>-3ау+4)
6)6</span>ax-9a^2+15ax^2=3а(2х-3а+5x^2<span>)</span></span>
[(cosa+cos7a)-(cos10a+cos4a)]/[(sina+sin7a)+(sin10a+sin4a)]=
=(2cos4acos3a-2cos7acos3a)/(2sin4acos3a+2sin7acos3a)=
=2cos3a(cos4a-cos7a)/[2cos3a(sin4a+sin7a)]=
=2sin5,5asin1,5a/(2sin5,5acos1,5a)=sin1,5a/(cos1,5a)=tg1,5a