0.625/cos(x)

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Solution for 0.625/cos(x) equation: 


D( x )

cos(x) = 0

cos(x) = 0

cos(x) = 0

cos(x) = 0  <=>  x = pi*k_1+pi/2 i k_1 należy do I

t_1 = pi*k_1+pi/2

x-t_1 = 0

x-t_1 = 0 // + t_1

x = t_1

x = pi*k_1+pi/2 i k_1 należy do I

x in {( -oo : +oo ) / < pi*k_1+pi/2 : pi*k_1+pi/2 >} i k_1 -> {I}

0.625/cos(x) = 0

0.625/cos(x) = 0 // * cos(x)

0.625 = 0

x belongs to the empty set

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