Упростить выражение: (sina*cosa)/(0,5(1-2sin^2a)). Created by Nekha. matematika-ru

(0,5(1-2sin^2a))...

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Упростить выражение:
(sina*cosa)/(0,5(1-2sin^2a))

Answers & Comments

julyap $\frac{sina*cosa}{ \frac{1}{2} *(1-2sin ^{2} a)} = \frac{sina*cosa}{ 1-2sin ^{2} a} : \frac{1}{2} = \frac{sina*cosa}{ 1-2sin ^{2} a}*2= \frac{2*sina*cosa}{1-2sin ^{2} a} = \\ \\ = \frac{sin2a}{cos2a} =tg2a$

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samaya nizkaya cena tovara po kotoroj prodavec soglasen prodat tovar eto a n

4 i ploskosti hu2z 90

najti rasstoyanie ot tochki mo do ploskosti prohodyashej cherez tochki m1 m2 m3 m1

podrobno reshit na osi ordinat najti tochku otstoyashuyu ot tochki a 3 4 na rass

na osi absciss najti tochku m rasstoyanie ot kotoroj do tochki a14 ravno 5

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