Пошаговое объяснение:
sint = 24/25, π/2 < t < π ( II чверть ) ;
сost = - √( 1 - sin²t ) = - √ ( 1 - ( 24/25 )² = - √[ ( 625 - 576 )/625 ] =
= - √( 49/625 ) = - 7/25 ; cost = - 7/25 ;
tgt = sint/cost = 24/25 : (- 7/25 ) = - 24/7 = - 3 3/7 ; tgt = - 3 3/7 ;
ctgt = 1/tgt = 1 /(- 24/7 ) = - 7 /24 ; ctgt = - 7 /24 .
Пошаговое объяснение:
sint = 24/25, π/2 < t < π ( II чверть ) ;
сost = - √( 1 - sin²t ) = - √ ( 1 - ( 24/25 )² = - √[ ( 625 - 576 )/625 ] =
= - √( 49/625 ) = - 7/25 ; cost = - 7/25 ;
tgt = sint/cost = 24/25 : (- 7/25 ) = - 24/7 = - 3 3/7 ; tgt = - 3 3/7 ;
ctgt = 1/tgt = 1 /(- 24/7 ) = - 7 /24 ; ctgt = - 7 /24 .