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qwerty1109
@qwerty1109
July 2022
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1+соsx+соsх/2 разложить на множители
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Lesben
1+cos x + cos x/2 = 1+ cos 2.x/2 + cos x/2 =
=1+cosˇ2 x/2 - sinˇ2 x/2 + cos x/2=
=1- sinˇ2 x/2 + cosˇ2 x/2 + cos x/2 =
=cosˇ2 x/2 + cosˇ2 x/2 + cos x/2=
=2.cosˇ2 x/2 + cos x/2 = cos x/2 .( 2.cos x/2 + 1)
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Answers & Comments
=1+cosˇ2 x/2 - sinˇ2 x/2 + cos x/2=
=1- sinˇ2 x/2 + cosˇ2 x/2 + cos x/2 =
=cosˇ2 x/2 + cosˇ2 x/2 + cos x/2=
=2.cosˇ2 x/2 + cos x/2 = cos x/2 .( 2.cos x/2 + 1)