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Кедруша
@Кедруша
December 2021
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1)2/tgt+ctgt
2)cost/(cos t/2 + sin t/2)
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pomoshnik09
Verified answer
2/tgt +ctgt=(2+ tgt*ctgt) /tg =(2+1)/tgt =3/tgt
2) умножим числитель и знаменатель на cost/2-sint/2
cost/(cost/2+sint/2) =cost(cost/2-sint/2) /(cos^2 t-sin^2t)= cost(cost/2-sint/2)/cost=
=cost/2-sint/2
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Thanks 6
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Answers & Comments
Verified answer
2/tgt +ctgt=(2+ tgt*ctgt) /tg =(2+1)/tgt =3/tgt2) умножим числитель и знаменатель на cost/2-sint/2
cost/(cost/2+sint/2) =cost(cost/2-sint/2) /(cos^2 t-sin^2t)= cost(cost/2-sint/2)/cost=
=cost/2-sint/2