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Freakazoid
@Freakazoid
August 2022
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сравните значения выражений, если
tga = -2
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Verified answer
Т.к. tga = -2 ⇒ sina = -2*cosa
подставим...
1)) ( cos³a + 2*(-2cosa)³ ) / (-4cosa) = -15cos³a / (-4cosa) = 3.75*cos²a
2)) ... = -3cosa / ( cos³a - 2*(-2cosa)³ ) = -3cosa / (17cos³a) = -3 / (17cos²a)
первое выражение больше второго...
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Answers & Comments
Verified answer
Т.к. tga = -2 ⇒ sina = -2*cosaподставим...
1)) ( cos³a + 2*(-2cosa)³ ) / (-4cosa) = -15cos³a / (-4cosa) = 3.75*cos²a
2)) ... = -3cosa / ( cos³a - 2*(-2cosa)³ ) = -3cosa / (17cos³a) = -3 / (17cos²a)
первое выражение больше второго...