* * * формулы приведения * * *
( 1 -cos(3π/2 -α) ) / ( 1 +sin(α+8π) ) = ( 1 - (- sinα) ) / ( 1 +sin(8π+α) ) =
( 1 + sinα ) / ( 1 + sinα ) = 1 .
(1-cos(3π/2-α)/(1+sin(α+8π))=1+sinα/(1+sinα)=1
* * * формулы приведения * * *
( 1 -cos(3π/2 -α) ) / ( 1 +sin(α+8π) ) = ( 1 - (- sinα) ) / ( 1 +sin(8π+α) ) =
( 1 + sinα ) / ( 1 + sinα ) = 1 .
(1-cos(3π/2-α)/(1+sin(α+8π))=1+sinα/(1+sinα)=1